Engine differences, V8's

I hope this has not been covered before. Aside from bore and or stroke, what are the differences between the 4.8, 5.3 and 6.0 ? I have a 4.8 and was wondering if there are "better" parts on the larger engines, and are they interchangable ? I'm assuming the blocks are the same as far as bolt on's go, although please correct me if I am wrong. Thanks in advance.

they all can bolt up to the same tranny however the bigger the engine things differ fuel injection. for one, injectors pump diiferent volumes. sensors are all diffrent cause engine tunes different... on a two wheel drive and 4 wheel drive with the same motor the only diffrence is the sensors are different and thats how it produces the extra 10-20 horse power.
bigger motors due require heavy dutier parts due to the torque that the engine produces.