It depends on the exact model, the dampers in the fork vary. Like, a Sektor TK is pretty basic, the better Sektor RL is a good midrangey performer, and there’s no top end model (*). The Reba doesn’t really have a low end model, but has some higher end models than the Sektor does. But there’s a big overlap- a Reba and Sektor RL are pretty similiar in perforance
(* the Sektor is basically a cheaper version of the Revelation- so instead of making a posh Sektor, they just brand them Revelations, and likewise there’s no bottom end Revelation)
So basically…Worry less about the name and more about the contents
Personally given the choice between On One and Halfords I’d go Halfords every time- past experience shows Halfords might occasionally be incompetent, but they’ve never actively ripped me off unlike On One.