Thanks for the responses guys..Yeah my issue that is holding me back right now is the Stabi offers a better upgrade path if I want to change Tonearms etc where the P10 is more closed system and you have to modify with shims for carts outside their ecosystem. Not sure that present any sonic issues, and likely could be swayed into the table that sounds best, but just don't have the chance to audition both.
With that said the cart will be umami Red, no question about it. So I'd have to shim on the Rega. I like the idea of being able to change the arms etc but have only been into vinyl for about a year and half (hifi for over 25 years) so I don't figured out if I am a fiddler or set-it-and-forget-it kind of user. Don't have a ton of time so maybe set and forget if I had to choose. I do love the design of both tables with an appreciation for Kuzma a smidge more given their reputation in high end.