I'm having trouble deciding between 25B and 25U both with airborne. Any advice?

I would ask what you are most interested in Computers or Radios? I am a 25B and have done various jobs such as help desk support, work order management (remedy), Video teleconferences, tactical network setups, call managers, network configurations, MS Office support, and others that I cannot think of.

25U from my experience have dealt more on the radio side but they are can also deal with computers as well.

There job description is as follows:
Maintain radio and data distribution systems
Perform signal support functions and technical assistance for computer systems
Provide technical assistance and training for local area networks
Maintenance for equipment, terminal devices, assigned vehicles and power generators

I cannot remember if the 25U are the ones that are color blind though. Physcially both still can do Airborne duty. As far as promotions go 25B are starting to speed up a little bit but were very stagnant for a while. I cannot speak for the 25U promotion rates.

I served as a 25U and performed duties as a 25B years ago. If you have an interest in computers then I would recommend 25B. 25U does having the opportunity to work with computers however as a 25U it was hard for us to get the unit to send us to pay for our certifications because they are not as necessary as they are for a 25B.

That being said, I did like my job as a 25U but job was not very challenging and I spent most my time helping people fix mistakes they made when trying to use their radios. If you have any specific questions about the job feel free to message me and I will be happy to answer.

Yes
Take 25B with AirBorne.
This puts you in the computer field of the Army's Signal Corps. Now you have to train and learn at the same time. Take notes always. This is a Growing and Competitive Field. These soldiers are in demand everywhere!!. Especially in the Special Operations Branch, where I retired from.