I don't have the TRX-2, but do have it's handheld sibling, the TRX-1.
My TRX-1 sits there, mute, while my SDS200 is receiving transmissions on the same system the TRX is set to scan. The 200 is also picking up systems, using a telescoping antenna, that some of the other scanners either had trouble with, or did not receive at all. The SDS200 seems to be much more sensitive on 700 & 800MHz trunked systems.
I've seen comments stating that the SDS200 and SDS100 lag on receiving air, Vhf, & Uhf signals, but I have not had those issues. However, most of the channels in those bands that I monitor are either close, have a strong signal, or both of those factors.