Don't know anything about the other mount but I have the TROS ultra low rail and it is indeed very low profile. If you want to mount your optic far back you will be unable to with this mount since the effective mount area is more in the middle and to the front. I am using my own design mount currently but am keeping the TROS mount in case I ever want to put it back on. I believe he has some specific optics mounts too that may be a more custom fit for your new one.
If you buy the ultra low mount and don't find it suitable I'm pretty sure Mark at TROS will take it back and refund your money. He was very responsive to my questions and concerns when I first jumped into the sbr market and he is a straight shooter.
If you buy the ultra low mount and don't find it suitable I'm pretty sure Mark at TROS will take it back and refund your money. He was very responsive to my questions and concerns when I first jumped into the sbr market and he is a straight shooter.