I have voted for T. Why? The large diopter corrected rangefinder with its long base is just great and allows for very accurate focussing, even in low light situations. With practice, focussing and framing with an external viewfinder can be done very swiftly, at least en par with a Bessa R.
Parallax corrected framelines are a point for the R, but in low light, focussing can be a bit tricky and slower than with the T. At least for me. To be honest, I like and use both, but I voted for T, because I think it is a bit underestimated. The overall built quality also feels slightly better than the R and it potentially allows me to use M lenses. I have not tried any other models.