as a rookie/regular driver/racer. I doubt you will feel much difference, if any, in response time, etc.
However, with bigger price tag, comes more responsibility.
If you crash a $1000 car because a very rare signal problem.
you can't blame the GT3B much because it's too dirt cheap.
But you can blame the hell out of 4pl because Futaba makes it, probably got changed even refund. (never experienced this kind of situation, so not sure)
*GT3C is a failure, guess they are a small company, got lucky with GT3B.