Bose if I only had those two options, but I would go with something from Audio Technica, probably the ATH-M50s.
Beats studio both wired and wireless are considered decent headphones sound quality wise.. and overall their wireless headphones perform better than many, including the top audiophile brands.
I'm trying to decide between the wireless studios and the QC25.
A quick note on people crapping over Bose and Beats: the OP specifically mentions the Studios or QC25. Every single recommendation so far have not met these requirements. Suggesting a wired, non-active noise cancellation headphone isn't going to work here. The fact of the matter is price isn't the issue because any wireless active noise canceling headphone is going to be around $300-400 minimum.
Second, everyone hating on Beats should really go read some reviews on their revamped line up. They're doing very well amongst reviewers, including sites like Inner Fidelity and Sound+Mag. Are they still over priced for the performance? Yeah a bit. Will the ATH-M50 or Momentums or DT-770 sound that much better? Probably not.
Alright, I'm going to go head and make some assumptions and give you some recommendations:
If comfort and noise-cancelling is the utmost concern with less of a regard for sound quality and a wireless feature set then go ahead and go with the Bose QC25.
However if you want a really good sounding bluetooth set and aren't really concerned with active noise cancelling check these out:
Sony MDR MK2
AKG K845BT
Sony MDR10BT
Stance S1
If you require both noise-cancelling, wireless connectivity, and good sound quality check these out:
Phiaton Chord MS 530
Parrot Zik
If you have to choose one of those? Bose.
Beat is overpriced fashion item thinking it is audiophile item.
Bose is just overpriced audiophile item.
A good list.. but I read the Zik's get really bad battery life with noise cancelling on, and sound bad with it off.
Haven't read anything about the Phiaton...
But reviewers rated the Beats Studio wireless above the Zik's fairly consistently. Not sure why someone should ignore them as an option?
How does HeadphoneGAF feel about B&W?
Check again
Active noise-cancelling is a feature that one should avoid if at all possible honestly, sound quality always suffers a bit from the white noise generated to cover up adjacent sounds. The sound quality of something like the AKG or Sony MDR 1R MK2 is so much more detailed than every Beats and Bose entry I've tested. I think the Zik sound better than the Beats as well, but both are overpriced if I'm being honest.
But the Zik's reportedly sound bad with it OFF not ON.