I did uni-led, and the thing I've taken away the most is a group of friends who all teach the same subject. We were such a small cohort (6) that we gelled really well. We spent weeks together at the start, as well as mid-way through and once every week. There were three others in our subject who were SCITT, but we only saw them once a week, and no matter how much we tried to involve them, they weren't interested.
Now, that's not to say you won't make friends at your placement who are also trainees, but we've now got a small support network of friends who have been through the same thing, as well as a whole variety of different resources and ideas from different placements as well as where we all work now.
At my second placement there were a couple of SCITT trainees, but they didn't really gel with each other. One would come to spend time with me at break sometimes but that's because their form mentor was my subject mentor, which is why we clicked. We've not kept in touch either.
My girls and meet up every month or so for brunch and talk daily.
I'm also a uni-person, I love everything about it (I'm also almost 40 so it's not a going out drinking/socialising thing) and would still be there now if I could afford to just stay a forever student 🤣