Marshall Monitor 3 vs Bose QC Ultra

I'm trying to decide between the Marshall Monitor 3 headphones and the Bose QC Ultras.

Budget: I really want to keep it close to $250. Right now I csn get the Monitors for $270, and I previously saw the QC for around the same price, but that deal is gone and I can't find anything lower than $400.

ANC: I will be using these headphones a lot for studying in locations that might have people talking. As such, the ANC is very important to me. I know the Bose ANC is better, but I'm wondering whether the Monitors are still good enough. I've previously owned the Bose QC II earbuds (before losing them) and the noise cancelation on those was more thsn enough for me.

Please compare the ANC on the Bose QC II with the Monitors if anyone has any experience eith both.

Comfort: Comfort is my #1 priority since I get uncomfortable with tight or hot headphones very easily, and I'll need to focus while studying.

Sound: I'm no audiophile, so I'm sure either one of these will be sound good enoughh for me.

Battery: The insane battery on the Monitors would be nice, but it's not a big enoigh deal to make that the reason I choose them since I carry a pinch power brick with me everywhere on campus.

Please let me know if you have any advice on choosing between these two. The Monitors are only on sale until Jan 5th, so I'll want to decide before then.

Thanks in advance for any advice!