Well, your mileage may vary, as they say.
Battlefield, as crappy of a game as it may be IMO, has plenty of dedicated players that love it (poor deluded souls! :lol: ). The endless comparisons between ETQW and BF will reach the same level of pointlessness as comparisons of any other FPS games are to Counterstrike (aka bani’s law). I groan to think about how many threads will vainly attempt to compare BF gameplay to ETQW gameplay. They are as different as apples and oranges, IMO. But there is still some truth to certain comparable gameplay elements, chiefly the use of vehicles in battle and as to how each serves its function in its respective game.
Unfortunately, what will happen is that fanboys of either game will foolishly attempt to assert that the vehicles in game x are inherently superior to those of game y. The only valid comparison to me is whether the vehicles in game x serve the interest of the gameplay of game x better than the vehicles of game y affect the gameplay of game y. I don’t want Battlefield helicopters in ETQW any more than I want UT doublejumping and redeemers in it. Nevertheless, those games have qualities which attract many players, and deserve a study of what elements they possess that make them work…and how those characteristics may or may not be useful to ETQW.
UT was my first FPS, and then Quake 3, but I personally liked UT better than Q3, but again that’s a matter of taste. The UT vehicles I found to be very easy to operate, perhaps too easy and it was brainless fun. It’s always funny to me how passionate people can be about how one game is superior to another, but I think they all have their strong points and should be studied closely. I’ve always loved the arcade style gameplay of Wolf:ET, which to me epitomizes the absolute perfection of online gameplay. However, one look at game popularity stats tells me that I’m not in the majority opinion. Nevertheless I’m very optimistic about ETQW because to me it seems to embody so many of the things I have enjoyed in my favorite past and present FPS games. 
