A Bronx Tale - best quality version available?

A Bronx Tale was probably shot in Academy then masked to 1.85 for theatrical. So the 4:3 version doesn't lose much on the sides, only gaining extra space and showing production gaffes (ala boom mikes) not meant to be seen.

The HBO release is 16:9 anamorphic (double checked, its 4:3 letterbox 1.78:1; fucking HBO Video!!). But being an early DVD mastered from the laserdisc source, its not pretty looking combined with poor compression methods. The Universal DVD is made from a new(er) master and is believed to have its grain structure intact (not released on BD by them in the states as of yet).

Then, like you said, there's the SC BDs which are from the UK prints which have been subject to DNR.

I thought Uni released a BD in the U.S, but then I read up and it was pulled when StudioCanal kept moving up the UK release date.

Hopefully, that BD will come (with a better transfer as Universal is the U.S rights holder while it seems SC is the international owner)