It is? Huh. Spriter's Resource and Mystical Forest (Yeah remember that?) had genesis sprites but not saturn as far as I'm aware.
Yep, the Genesis version of Sonic 3D Blast came first, and then, when Sonic X-Treme was canceled, a Saturn port of 3D Blast was created to fill the void. I remember that from the Mike Wallis Sonic X-treme interview way back when