I'd definitely go for noise reduction.
Bluetooth in most cases is just to connect a mobile. Helpful only if you're sitting half a day in the cockpit fully equipped and doing nothing... For me as a PPL I didn't find any use case for this.
More important than a good noise reduction is the fit to YOUR head.
MY head is best fitted with the LS Zulu (1). I'm very content with this one.
So I would recommend you testing a Zulu PFX or a Sierra.
But if they don't fit to your head and ears: DON'T BUY.
Check the current Bose A20, Zulu PFX, Sennheiser S1, Zulu.2, Sierra and maybe a David Clark Pro-X
Happy landings
Thracian