There were several vintages of Contender frames from 1967-2000, and now the G2. Most user friendly of the originals was the Easy Open vintage that started with serial number 195,000 near the end of 1981 and ran until they were discontinued in 2000.
"The main diff I can tell is the G2 will allow you to set the hammer down and then recock the gun with out opening it."
A common misconception and not true at all... you can easily recock the original EO's as well without opening the action if you know how. The real difference between the Contender and G2 triggers is the former can have a much sweeter trigger than the G2.
The pistol/carbine frame thing is a joke IMO, and I ignore it as just that. BATF doesn't know... I doubt even TC knows how any frames made before the plant fire were first sold if production records were lost for them like they were for all their muzzleloaders. No doubt the lions share were sold as pistols though. So nobody in LE actually knows what your frame was first sold as, and in normal localities nobody in LE cares as long as the configuration you have it assembled in meets the legal limits established for handguns/rifles by BATF and local regs if any. If you live in a place like the Peoples Republik, well, you reap what you sow I guess by living there. In 41 years of being a very heavy user of Contenders for hunting and competitive shooting across at least a dozen western states nobody has ever asked what my frames were originally sold as. If anybody did ask that I felt had a right to an answer, I'd say that they were all pistols. As handguns they can't say squat when I've got them configured as legal carbines. It's a legality issue that I took a firm stand on years ago. YMMV, so do what's right for you.
BTW, I bought my first Contenders from 1967-1976 as a resident of CA. Back then they hadn't gotten around to trumping up against hunters and shooters much yet.
L.