both are great rifles (although the Fulton is probably better than Springfield and priced appropriately).
however, the Garand is like battlerifle 1.0 and the M14/M1A is like version 2.0

The garand is more fun, bang bang...bang ping is a hoot. But it's not cool in a bad situation, you also can't top off and it's of course only 8.

The M14 has the same sights with a better gas system and of course detachable mags holding 20.

Depends on what you want it for.

I have both, I like both, and they are the best MBR's out there, but if I could only have one, I'd say M14/M1A