The kid at the board shop said that the FST is a heavier more sturdy construction. Not sure what this added weight does but I was wondering does one float better than the other or does one sit heavier in the wave than the other? Is the float the same regardless of weight?

I am waiting for my 6'1 hellrazor to be delivered and I am trying to decide on a set of fins. I was looking at the 5 fin sets. Interested in the Rusty R1s but wanted to get some feedback.

I am 6'2, 180lbs lower level intermediate skill level. Looking to use mostly in S. California. Trestles, HB mostly.