WS setup varies in certain slots, but it's really not completely different. Pure STR vs. balanced STR/ATT. Fudo is a 60% STR WS with high fTP and no ATT boost, and Y/G/K are 75% STR WS with lowish fTP and a large ATT boost.

Grips not included, as they'll vary depending on TP gear.
Ideal Y/G/K: http://www.ffxiah.com/item-sets/215433
Ideal Fudo: http://www.ffxiah.com/item-sets/215435

The ideal Fudo build will become even more similar to the Y/G/K build the closer you get to capping attack against the target, until the point that they're identical.

If a SAM doesn't have Fudo, he should really be considering Penta Thrust or even Rana instead of Y/G/K. Y/G/K is far from optimal in situations where one can expect to have a significant amount of ATT/ACC.