for those that are interested.
After a couple of sessions with both units installed, I have now removed the Mooer Radar from my setup and installed the TC loader.
IMHO, I do think(believe/imagine) to hear a difference. My favourite high quality IR's (Celestion Bergantino, Redwires, Dr. Bonkers - all in 96/24 200 or 500ms) just sound a little bit livelier on the close miced IR's and a lot better on the IR's with mixed in room mics.
Also, the ease of use for the TC app in managing larger goups of IR's has won me over.
Another factor has been that the TC seems to be more tolerant of a higher input signal than the Radar, which is very easily overdriven...
from the TC website:
"Cab Sim and IR Loader to Host All of Your Favorite Impulse Responses with 20 built in cab models, A/B mode, 99 IR slots and supports IR lengths up to 200ms"
i use the 500ms Bergantino IR collection - seems these are incompatible with the TC IR loader.