I believe I saw the polycarbonate regular carry-on on a CRJ900 yesterday, Y AB section of Air Canada Jazz config. Had to be in sideways, insert wheels first & rotate, and it was a very tight fit - bin barely latched and gaped a bit on the ends. The most stringent requirement was the bin height and luckily polycarb will flex a bit. If I flew that config frequently and wanted to go with hard sided wheeled carry-on, I'd definitely look for something less than 9" deep to make sure the bin could be closed securely and easier to put in/take out without straining. Earlier thread notes CRJ700 common bin depth is 8"
B&R International bag on CRJ700 or RJ135? so even the Away kids carry-on would be too deep.