This is a tricky one to me. Baez I believe is the better prospect. Yet hobby wise, I would say Sano, cuz there is so few Chrome Auto's 9.5/10 when compared to Baez.
Current count is
Baez- 19 total 10/10 Auto Regular - Red yes 19 PRISTINE, 345 9.5/10 Reg - Red
Sano-28 total 9.5/10 Auto Regular - Red yet only one pristine Auto Gold Ref
So if Sano lives up to his potential the sky is the limit to me on those. Bigger market or not the ceiling on Baez has to be somewhat limited long term for 9.5 considering 10 are that common.
Current set of 96-97 Topps Chrome Bask Refractors all PSA 9 Miguel Sano BGS 9.5/10 Bow Chr Auto's, Exquisite Auto's of Thurman Thomas in Bills Jersey Only
Archer Sketches of Lana+Archer Comics-Harley Quinn stuff