Hi @astrobuf ,
You totally can use the A part code, take an example, as you know, the NXP MIMXRT1060-EVK board is the MIMXRT1062DVL6B, but if you check the related SDK project, you will find it also the A part.

Until now, I didn't find any issues.
About the A and B part difference, just check the errata document.
Wish it helps you!
Best Regards,
Kerry