Teddy,
While I don't consider Encore trigggers to be too bad to start out with, I personally like mine crisper and under 3# for general use. I sent both my Encores to SSK (a GBO sponsor)and am very pleased with the results. As far as what the difference might be - that's pretty much up to you to specify to whomever does the trigger job for you. Do you know what you have now - and what pull weight you would like it to be? Talk it over with whomever you want to do your trgigger job. Good luck!