I've got a 13 year old (but lightly used) Jewell and a new Geiselle. Both feel about the same, and are very good. Maybe a slight nod to the Geiselle if you're a trigger snob. But it's slight once you get them adjusted properly. The Geiselle is put together a little bit better in my opinion. The instructions are very good. They have a website and some very good videos on You Tube. They sent me a bunch of swag with my order. The attention to detail that Geiselle puts in his triggers is obvious and welcome.
Jewell on the other hand, has no website, lackluster instructions, and I'm told (I wouldn't know for sure since they don't make the info easily available and I don't care that much) that they use a weaker hammer spring that can cause problems with the hard primers that are often used in AR's (and contributes to a slower lock time). I've also read that this hammer spring causes problems on the .308 platform rifles, but that Jewell has fixed that. You'd have to dig up a phone number and call them to verify this.
The one advantage I can think of that the Jewell has over the Geiselle is that you can adjust the first stage weight without taking the trigger out and bending a spring. Maybe it's psychological, but I don't have the same feeling of trust looking at the Jewell. A little slop here and there, although I can't feel it in the trigger, makes me nervous about the durability. That said, for a match rifle, it's miles ahead of the stock triggers. For a field rifle, I'm not sure I'd use a Jewell if I had a choice.
All in all, my next trigger will be a Geiselle. It's a really impressive unit, and it's available in just about any configuration you can think up.
