Seth just keeps jumping back and spamming slow speed sonic booms, nails him with jumping fierce punch or his ultra any time albert tries to jump in or get close, jumps off the wall and uses his ambiguous jumping stomps to annoy him or does his trademark sonic boom + teleport behind to command grab GG albert but seth can defeat omnipotents with this bs.
Seth's teleport is more useful than Wesker's. As it also can lead to Seth ending up in completely different locations on Earth in a matter of moments (Dhalsim's teleport). Wesker has tanked a rocket explosion and can casually toss missles with explosive speed. That's an edge up over Seth. Seth can attack so fast that he can kick a foe 17 times while the naked eye can only follow 1 kick. Seth can also "pull a Cell" and learn moves just by watchin'em and to a serious degree (he learned to phuckin' teleport by watchin' Sim). His Tanden Engine also steals power from the surroundin' area, while also stealin' fight data. And Seth can levitate high enough for it to be a problem for Wesker
I think Seth takes this, he has too many abilities for Wesker to handle. I think Wesker can keep up but when Seth starts throwin' Sonic Booms and abusin' the Tanden engine, Wesker will go down.