That is not the right thing to consider.
The number one issue is ease of use/ability to correctly use the beacon. All modern three antenna beacons are good enough, the biggest difference is how they display information and how they switch between modes. You want one that guides you in a search in a way that makes sense to you, whether that be voice commands, arrows, or other combinations. You also want a model where it makes sense how to switch between modes, because you
absolutely cannot stay in send when you need to switch to search.
@Zososoxfan Here are the things to think about:
What are others in your group using? If your guides had a particular beacon they had you use, I would strongly consider the same model (or a similar model from the same company). You will be familiar with it, and they will be familiar with it. The second part is really important, since if you freeze up in a crisis they will be able to switch it off. People panic in an avalanche, and guides are unbelievably good at this stuff, so you do not want to screw them up.
Does it fit on your body? Some beacons feel lousy against the body, and people instead put them in a pocket. Don't do this. Avalanches are violent and can rip that beacon out of your pants very quickly. There are some pants with reinforced pockets for beacons, but I'd be really wary of using them. The beacon should be on the lowest layer of clothing, under all other layers.
Keep it simple. Some beacons have features to mark spots for multiple burials. You are not good enough to use this feature--it is for guides who are amazing at this. At best it is another way for you to screw up. Get the regular model.
Don't go bleeding edge. Last year, a few people in my group showed up with new designs, stuff like a flip phone instead of a knob to switch from send to search. These models generally were generally harder to use and had more problems. I'd stick to tried and true designs.
I like the BCA tracker 3 and the Mammut Barryvox, but others are good as well.