Similar to muf, I've owned the T3, TC-1, GR1/s/v, and have played extensively with friend's 35ti and 28ti. Sold the TC-1 last month, now the only keeper is the GR1v. A real shooter it is, with nice optics (not as good as the Sonnar and Nikkors though), custom ISO setting and what is the most important to me, top ergonomics.
Seems I'm going off topic as well...🙂
Yes Colin, as you have mentioned in the original post, both are top class shooters that gives more than excellent if not superb results.
Major difference to me: The T3 is pocketable, The 35ti is not. However the Nikons (35ti and 28ti) are a little more comfortable to shoot with. They come with matrix metering, better handling and better craftsmanship at a cost of size and weight, while the T3 has slightly better optics, smaller size and much reduced weight, and is slightly faster in focusing. Do notice that many pros use the T3 for important assignments because its dual shutter mechanism offers an astonishing top speed of 1/1250s, a feat nothing in this class could compare to. The 35ti's with others here, of which the top shutter speed is a standard 1/500s.
One thing that troubles me with the T3 though: rich in features it is, it lacks dedicated controls like a compensation dial. To compensate you must press that tiny Mode button hard first for four times (!). Changing rolls mid-way is a pain too.