Not an expert, but here's what I know
Contender - original model, made since the 70s, with a few changes during production. According to some, some of the barrels for one "generation" will not fit on other generation frames. I do not know if this is correct, as all the barrels I have bought for my Contender frame have fit ok.
Contender G2 - new version of the Contender, easier to open than the original ones, can be cocked again after letting hammer down without opening the action (original Contender must be opened before being recocked). According to the factory ads, all original Contender barrels will fit the G2 frame.
Encore - a beefier version of the Contender, which will take higher pressure cartridges. Encore barrels only fit Encores. Contender barrels do not fit Encores.
Lots of used Contenders out there at the gun shows and shops. G2s and Encores can be had new.
Hope this helps.
Keep an eye on T/C, now that S&W has bought them, things could get better, or worse.
Contender - original model, made since the 70s, with a few changes during production. According to some, some of the barrels for one "generation" will not fit on other generation frames. I do not know if this is correct, as all the barrels I have bought for my Contender frame have fit ok.
Contender G2 - new version of the Contender, easier to open than the original ones, can be cocked again after letting hammer down without opening the action (original Contender must be opened before being recocked). According to the factory ads, all original Contender barrels will fit the G2 frame.
Encore - a beefier version of the Contender, which will take higher pressure cartridges. Encore barrels only fit Encores. Contender barrels do not fit Encores.
Lots of used Contenders out there at the gun shows and shops. G2s and Encores can be had new.
Hope this helps.
Keep an eye on T/C, now that S&W has bought them, things could get better, or worse.