I have both.
The T35 is optically superior.
If you limit the T50 to 40x mag then it rangefinds as well as the T35 but rather differently, it is a little more vague about the point of best focus and there is some backlash in the mechanism that the T35 doesn't have, so you do need to learn the scope, and how it works, to get the best out of it.
The advantage the T50 has is the mildot ret, which makes wind allowance easier to manage. If the T35 had a mildot ret and still sold for under £300 it would be very hard to beat, value for money. I've told Nick about my views.