My SP's basic.or 'retro' if we're being nice. So even if he'd been around, he still might not agree with that. Someone who 'made the best screenpacks' is a subjective statement.
This guy said he 'started to idolize the sp at the beginning of the pandemic.' It's likely this guy just showed up on the mugen scene, has no idea who Vector is cuz he's gone, only knows about mugen based on what he see's on facebook(like a lot of people really), learned what he could in the time given and produced a SP that reflects what he's gathered in that amount of time. It's obvious he borrowed from Vector, but it's different enough to be considered his own. It's really nothing new to use sprites, concepts and other things from other creations. Tbf, a lot of Vector's screenpacks look similiar.