I prefer FW for freedom reasons, that’s worth a few hundred as well as the ram. Would also wait for the new intel chipset that is more efficient however.
Finally I think the FW 12 is weirdly positioned, as the 13 is already thin and light. For a tablet, I recommend the Star Labs Starlite instead. Both in same package? Clunky.
Guess I’d recommend a used FW 13 and Starlite instead. That’s what I have now and no real reason to upgrade, and freedom to tinker is off the charts, perfect for a student.