So... How many dives did you have on your 5/4mm EverFlex before you found it "very compressed"?
P.S. I used Bare 3 mm in the past. When the second one became very thin, I switched to SF because of (to be honest) wrist and ankle zippers - it does not matter for the warm water but much more convenient with multiple don/doff. (I do prefer the very tight fit.) I found that the SF fit is even better for my body, especially "Sport". However... compression, very fast compression is not the feature I was looking for...
To be honest, I have not really noticed my SP suits being particularly thin. But, they are old models and maybe I just haven’t really been paying attention to that.
What is SF? I know ScubaForce makes drysuits, but I don’t think they make wetsuits.