When I started in the 80's all we used was Bryant. (A nice upgrade from the FPE that dominated this area in the previous 2/3 decades) In the late '80's early '90's a brand named General Switch was making/ selling/ branding a very similar panel with copper bussing and the same color coding on the breakers, but with the General Switch branding. They only were around this area for a few years. I've used Bryant, Challenger, T&B, Cutler-Hammer BR series and Eaton BR for 40 years. They were "all the same", but only Bryant and GS had the color coded handles. Like others said, I always considered "Cutler-Hammer" the CH series. For a while the price was so close on BR vs. CL, I only stocked CL. I was doing a lot of new houses and a lot of service work.