The X-T5 is the more robust version with faster continuous shooting, an upgraded autofocusing system, etc. But do you need those features? If not, you're getting the same image quality and smart technology with the X-T50 in a smaller package and for less money.

As for the digital teleconverter, there was a firmware update for my X100V that applied the digital tele to both Jpegs and RAWs. That was what I needed. I can't confirm, but am fairly sure, that the X-T50 will be RAW+Jpeg as well. Thanks for your note!