The differences are absurd in size. However, I think Gallente crews would still be smaller. Reasons being advanced automation technologies and far more importantly the tendency to utilize that to its fullest. Caldari are by no means not high-tech, but they have a culture ( and society, when one thinks about how nice that would look on a CV ) were serving in the navy is important.
Since capsuleers usually don't have official navy personel as crew things are bound to be a bit different, however one could argue that the design is based on the racial differences. Therefore a brutix is designed to need less hands than a ferox, regardless under which banner it flies.