I have the R and the T, and use each about equally. With the Leitz Imarect finder on the T, the framing is quite accurate, assuming I remember to set the distance lever on the Imarect. I usually keep different types of film in each- BW in the r and slide in the T for example.
Each body has it's strengths, R obvoiusly has the viewfinder built in with the parallax compensated automatically, but the M mount on the T is nice, as is the rangefinder, and i really like the location of the meter indicator on the T, I wish the R had the meter out of the finder like that.