I'll probably order the OmniSwivel just to have a look at it.
Okay, I got the OmniSwivel on a Conshelf now. It's obviously better build quality than the cheaper version, but the big difference comes when the pivot bolt is snugged down. On the cheaper swivel it will lockup with the bolt snug, while on the OmniSwivel I can snug the bolt to my satisfaction and still have a smooth pivot action. That's the big difference, and it's worth the extra money IMHOLet us know please.