I wouldn't' say a RM would be useless with either of these amps but you wouldn't be getting the full effect of what it is designed to do. A regular clean boost RC or Timmy type might be better
However, as well as boosting a set treble frequency a lot of RM style pedals such as the AM Beano feature switches to alter the frequency being boosted and a volume/gain control too. These could give you some interesting volume boost and tone options...plus treble boosters add a nice sparkle to the clean tone with the guitar volume rolled back.
A TB is designed to boost upper mids with a hint of dirt in the boost. In the process, it knocks off some bass and offers a very tight sound. Works best in front of a moderately overdriven amp/pedal that has full bass content, like a cranked Vox AC15 or AC30 (normal channel, not Top Boost channel), or a cranked Plexi/JTM45.