My friend actually is an analog-only audiophile, and has been for decades. He had the FM223 in his system for a few years, and then moved on to other phono stages, including the Ypsilon VPS-100, which he has currently in his system. I don’t know his actual music tastes, but he has extensive experience in listening to various components (if they’re analog).
Yes, I suppose I could’ve purchased the Basis reflex clamp for temporary use on the Rega, while I decide on an exact upgrade, but one thing I like about the SOTA reflex clamp is that it’s not a twist on clamp, but just has a lever that you press, which I suppose would give more consistent clamping that a twist on style of clamp, which I think SOTA also has a version of. As to which clamp it better, I cannot aver, as I’ve only ever heard the SOTA. However, I’m sure the Basis is also an excellent clamp.
I would recommend to anyone with a turntable that doesn’t come with a clamp/weight (which includes all Regas) that they should definitely try a clamp, as the sonic improvement is so marked that even my wife (who doesn’t even have a "good ear") can tell a significant improvement.