According to retrorgb, the jr/mini outputs the best RGB, but with the caveat that it doesn’t natively output RGB and will require a mod. And the taboo of the jr/mini being an “OEM clone”.
The 1-chips output non-fuzzy and very good RGB natively and without the taboo of being an “OEM clone”.
It’s all pretty subjective, with a few things to truly weigh in the balances for personal preferences, and chalk it all up to what you will.
Those are my understandings of the differences, anybody is welcome to correct me on anything I got wrong or missed.