FED you are sitting behind the axle, legs over.
Altered or F/C, you are sitting on top of the axle or slightly ahead.


I'd guess that the FED with less eye height and backside closer to the ground would feel faster, even ignoring those slicks next to your elbows.
Aside from less overall length making it steer tighter, I don't know how the same drivetrain would make it easier. Adding cooling?

Haven't driven either, but have dreamed of both!