I was actually going to make a post on this recently.
I work on cars for a living, so I spend most of the day in nitrile gloves. Since the pandemic started, availability has been an issue, so I've had a chance to try various brands as we "get what we can get" from our supplier. Thankfully it's getting better than it was, but pricing has definitely gone up.
Hands down my favorite are Black Lightning gloves. 6mil. Fit well, quite durable. Really good for being able to reuse them if they're in fine shape. Between cost and environmental concern (it came up in another thread that it sounds like nitrile lives forever in land fills), I try to reuse gloves as much as possible. I have a box at home that I've barely made a dent in since after I'm done using them I'll wash them, let them dry, and use them again next time.
Black Ravens are next. I'd say an equivalent glove in quality, fit, and durability to the Black Lightnings.
Glove Plus Black Nitrile: Meh. They worked. Didn't fit as well for me as the top two, nothing remarkable regarding reuse.
Gloveworks - Sorry Bosko, I absolutely hated these. 5 mil thickness. I've never gone through gloves so fast in my career. While I can wear a pair of Black Lightnings/Ravens for a good part of a day, the Gloveworks would frequently barely make it through a single car. Their lower cost was absolutely offset by how fast they were failing. It literally got the point I'd start putting another glove on over one where a finger/back/etc tore just so I could keep working. Not only would they fail just putting them back on if you tried to reuse them, but I'd also have them blow out just putting one on straight from the box.