What are the Pros and cons of switching from the Marine Corps to the Army?

Faster promotions and better choices if crayons.

The following is based on my own experience in the military. Yours and someone else's may vary GREATLY from mine:

Marine Corps Pros:
Better-looking uniforms
Better general self-discipline within the ranks
More esprit de corps as a whole
Better adaptability rate to shit conditions

Marine Corps Cons:
Can be mentally debilitating
Fewer opportunities at advancement
Fewer quality opportunities at schools
Fewer in-service opportunities beyond being a Marine

Army Pros:
Better chances at schooling
More opportunities at advancement
More in-service opportunities beyond being a soldier
More chances to use better, state-of-the-art, cutting edge technology

Army Cons:
Uniforms aren’t as iconic
Less self-discipline within the ranks
Less holding each other accountable at all ranks and all levels
Worse adaptability to shit conditions

These are just some. Not all. But based on what I saw when I was in, you'd be good to go switching branches. The Marines I know who came over to the Army did very well. But think about it, weigh all the options being given by both branches, then decide which one is best for YOU! Not someone else.

Four years in the Corps and over 16 in the Army. Promotions was quicker, lack of mission first with the Army, I do not regret switching branches , been retired 22 years and still feel great, mission first! Semper Fi!!

Army vet here, Semper Fi.

Dad told me if I ever joined the Army he’d kick my ass so hard that I’d have to unzip to smoke a cigarette. That being said, I joined the Marine Corps. Got almost everything I wanted from the Corps; helicopter mechanic then helicopter crew chief. After four years and an extremely unpleasant experience with a Staff Sgt, I got out. Civilian life sucked tennis balls through garden hoses. The Army was still a big NFW so I went Air Force. Stayed in helicopters and stuck it out for another 21 years. I miss the Corps. The esprit de corps was way better than the Air Force as a whole. In the helicopter related world, we were en par with all branches rotor winged maintenance.
Air Force has better food, better equipment, better billeting and better quality of life than all the other branches combined. The Air Force also has special ops. PJ’s, combat weather, combat controllers and TACP. Check with a recruiter to see what’s available.

If you have to ask that question, join the national guard, any doubt, confusion, hesitation etc can be crucial to an operation and your unit and mission success ….

Army you you and you put up the flag pole !!!

USMC. “SGT put up the flag pole !!!!
NOW, ask yourself what is the difference ????

Greetings Devil Dog!
I understand your situation, brother. The best coarse of action would be for you to contact an Army recruiter and enlist as an 18X. That recruiter should guide and assist you in navigating through your current contract and the 18X path.

Semper Fidelis!!!
God speed!

Greetings,
I did exactly that for which you speak. I had the TIS. But not the rank in the Marine's commensurate to the eight years active duty, 0311. So got out went to Army same MOS. Didn't have to go to Army basic, eligible for E6 immediately. But some Marine schools aren't accepted. Army sent me to all schools and got promoted. But know matter what. Nothing and know where will Ever touch the Corp's Espre' De Corp.
Always Faithful!

I was in the Arm first Navy second. My primary MOS in the Army was 11B. Secondary 95B. And had third MOS 11C. When I got back from Korea the Army saw fit send me to Tow Gunnery School. When I reported to Fort Campbell I was notified I had made E-6 . Went before Board while in Korea. I did 3 tours in Vietnam two as 11B and my third tour I was OJT MP. Was awarded secondary MOS 95B (December 1971-1972). I had a buddy in the 296th MP's at Fort Lewis He wrote to me stating there was a shortage of MP's in the unit. and the unit was looking for E-5 and E-6. So I had orders for Fort Lewis anyway after my third tour. I was able to get in the 296th MP's at Fort Lewis (January 73-September 1975). Was on Levy to Korea as an E-5 in my primary MOS 11B. I was spoiled by now and enjoyed MP Duty. In December 1977 I was up for reenlistment . 101st Airborne Division all releasements would only be in Primary MOS. So I elected to get out. I met a Navy Recruiter who told me about Master at Arms duty (same as army MP). I was able to lose one stripe and go in the Navy as an E-5. Master at Arms rating. There very few Master at Arms at E-5 level. Most had to be E-6 and above. Having secondary MOS 95B in the Army got me as E-5. I enjoyed my time in the Army. The comradery was top notch (especially in the Infantry) . In the Navy aboard Ship I was the only Rated Master at Arms. I t was knoiwn as Independent duty. One ship was an LST (Hauling Marines and the landing craft). Made friends with dome of Marine Staff Sergeants . i was E-6 by this time. The Young Marines gave me the most trouble, so I would get help from the Staff Sergeants I knew. They put those young Marines in line quickly.

Utmost respect for the Marines. I definitely want them close during a firefight. Discipline, morale, esprit de corps, they are top notch.
I was Navy, then Army Infantry, then Army Nurse Corps. While I was never a Marine, I have served with a few, so here's my take on changing...
Pros: More room for advancement. More opportunites to earn a commission. More opportunities for advanced training. More diversity of assignments. More organic assets like transpotation and aircraft.
Cons: Less discipline, especially among non combat arms elements. Lower standards for physical fitness, except for light infantry units. More bureaucracy, and nonsensical BS. Longer deployments.
I am sure there are more, but this is my immediate response to the question.
Best of luck in your career!