New to TT, Bit timid to tow ...?

Good move, asking questions before you buy something. I’m not that familiar with either the Nissan or the Toyota and will let people who are answer that, but I will say this. Dry weights typically wind up understated. Tow ratings are a relatively useless number. The payload of your TV is what you need to know, you’ll run out of that well before you get near the tow rating. Your available payload is your TV GVWR less its weight as equipped and EVERYTHING you put in it plus the wd hitch. Your real tongue weight will be about 13% of the loaded weight of the TT. So a 6000# TT could have a tw approaching 800#. Also if you tow near your max and spend much time in the mountains you likely won’t enjoy the experience, so you need some slack. I think 6000# loaded would be a handful for either vehicle, but as said, I defer to those who know the vehicle specs better than I.Last thought, do not believe anything a salesman tells you about what you can pull. His job is to sell TT's, not look out for your interests.