How would Combat Related Special Compensation (CRSC) benefit me?

CRSC may result in some of your Army retirement being replaced.
What I mean by this is as an E6 your TDRL or PDRL orders will show what percentage the Army has assigned your disability. It is unlikely that your Army retirement pay will exceed the 100% that the VA has given.
Having said that your LES will show no payment due by the Army since your Army retirement is less than the VA.
CRSC may make up some of the money that you are not entitled to under concurrent receipt since you don't have 20 years in.
You have nothing to lose and everything to gain by doing the packet.
Make sure that you get assistance with filling out the CRSC packet since it is up to you to document your disabilities that make you eligible for CRSC.
If your AW2 Advocate or VSO can't or aren't helping you with the packet I'd suggest contacting the National Veterans Legal Services Program.
https://www.nvlsp.org/
Good luck and take each day as they come after you retire.

In my case I get CRDP and my retired pay. If you are disabled, you should as well pursue what exists in respect to Social Security Disability benefits as well.

What is your DOD rating? And yes, it benefits you by getting monies?

Let's point out the rather obvious of financial benefits. Retired pay plus the money from CRSC will not be a windfall but it definitely helps. As well there programs to train you in a new civilian career while you get pay. Contact any VA office or start with the DAV (Disabled American Veterans) to begin with. They are an excellent resource for helping you get your benefits and helping with identification of programs which can help you obtain your goals and career objectives.

Your Military Service Coordinator (MSC) who works with the Integrated Disability Evaluation System or IDES program should be a good in-person reference for CRSC info as you transition from Military Service. You can file a CRSC application once you are receiving your retired pay and the application is processed through your Military Branch. CRSC and CRDP are DOD/Military Benefits. But definitely seek help with the application from an SME, a good Veteran Service Organization rep like VFW can help.