Could anyone please advise what would be the best Processor between "A10-7870K [Radeon™ Brand - Radeon™ R7]" and "A10-6800K4 [Radeon™ Brand - HD 8670D]". And why??
If you need to go with an APU for a budget/compact build, I would suggest the 7850k instead.
If you need better gaming performance, a discrete CPU + GPU won't cost that much more and will give you better overall performance and a cleaner upgrade path.
There's nothing worthwhile that distinguishes one from the other. The A10-7870K is two years newer and is built on a newer manufacturing process, so you may as well take that.
Just out of interest, what do you want to use the PC for? There may be better alternatives.
If you need to go with an APU for a budget/compact build, I would suggest the 7850k instead.
If you need better gaming performance, a discrete CPU + GPU won't cost that much more and will give you better overall performance and a cleaner upgrade path.