lol. you know I do. It just depends on what "treble roll off" refers to.
To my ears, togo 334 definitely has very smooth treble, warm signature.
435 has more upper mid, lower treble energy which might make people think it has much greater treble extension compared to 334.
To my ears, all 335, 435, 334 have similar treble extensions with 435 has a brighter/more forward presentation. （But they are only demos, so might not count although I feel I am experienced enough to play around with the tips and sealing to get the best/realest sound)
On the other note, actually NT6's treble extension isn't as far as SE5, but I wouldn't be surprised if people say SE5 has rolled off treble compared to NT6 (because NT6 has much brighter sounding) which is not the case at all because SE5 has a smoother mid treble region. So just a matter of how far (frequency) you can hear things and how you wish to describe them;)
Edited by tupac0306 - 12/8/13 at 1:15pm