well now I have tried both
I dived one week with my new omer tuna comps. and was impressed as in the beginning they seemed to be lot more flexible than sporasub radicals. but after a few days I dived with omers I found out that the difference was in the way the blade works rather than in the stiffness.
Sporasubs were really slow well that's what I think and perhaps so because they bend mostly from the area close to the foot pocket.
Omers bend fairly equally from the tip to the beginnig, I liked that...
They both are good but require different technique when swimming.
I would go for tuna comps now, since I like the way the blade works..

and they are cheaper too..
