I've been comparing the 97 SE versions to help dark_jedi with an eventual future project, and I can tell you that the Flunk version is not the best.

Flunk has crushed shadow detail and is oversharpened.

Reivax has some weird frame-blending which adds more smearing, and makes each shot fade into each other by one frame.

The best is Gkar, and TB is second, being a bit more blurry than Gkar.

By the way, by Hybrid, do you mean like layering Gkar and TB on each other to get more detail out of them?