The 302 and 502 use different power tubes (EL34 for the 302 and KT88/6550 I believe for the 502). Considering this if vocals are more important to you than bass the 302 ought to be a no brainer (the EL34 is typically considered the best non-SET midrange tube out there).
This said though you may want to take a look at the Prima Luna Prologue One or Two. The Prima Lunas have an auto bias feature and higher build quality than the 302 (all point to point handwiring as opposed to circuit boards for the Jolida, plus the Two can accept EL34, KT88, and 6550 type tubes). They're more expensive but may be worth it considering the higher quality. I just bought a tube integrated so I've been researching amps in this price range for the past two months.
This said though you may want to take a look at the Prima Luna Prologue One or Two. The Prima Lunas have an auto bias feature and higher build quality than the 302 (all point to point handwiring as opposed to circuit boards for the Jolida, plus the Two can accept EL34, KT88, and 6550 type tubes). They're more expensive but may be worth it considering the higher quality. I just bought a tube integrated so I've been researching amps in this price range for the past two months.