I’ve also tried a few different brands and have personally found the best luck with Nockturnals. Though the weight is greater, there are other variables at play and I’ve even have some nocks group higher and to the left or right simply based on nock fit changing tune. My nockturnals are actually pretty close to my non-lighted shafts (Uni bushing and g nock). I shoot a lot and hold respectable groups and wouldn’t hesitate to use the nockturnals based on my testing so far. In fact, I like them enough that I plan to use them from here forward.
I have a bad habit of leaving arrows in the woods when I put an animal down. Be it losing them to a grain field, or buried somewhere down range in the forest, or taking follow-up shots when presented the opportunity, it can get expensive in a hurry. Thus far, I’ve found all arrows shot with lighted nocks, and have been more confident in my shot placements after watching them in flight post shot or on video. There are definitely benefits and if you find a nock that doesn’t result in accuracy trade offs, I think they’re a wise investment.