The hardware architecture doesn't really matter, it's the Operating System which differentiates.
These days, I only use Windows on my employer's computer. Well, not quite true. I do occasionally boot up my iMac under Windows 7 to play Skyrim. That 27" screen allows Skyrim to really shine!
My own personal computer history started with an Apple ][, then moved to an IBM-compatible computer running DOS and Lotus 123, followed by an original 128K Mac, 512K Mac, 1 Meg Mac, 12 Meg Mac LC, then a change of employer took me off into Windows for too many years. During that time I built several computers for the fun of it, and briefly had some awesome computing power each time a build finished.
Anyway, I'm back in Mac OS Mavericks on a beast of an iMac, with 8*3.4 GHz processing, 32 gigs of RAM and about ten terabytes of disks, most of which is taken by backups and more backups. An old MacBook Pro which was born with 2 gigs of RAM has been boosted to 8 with a 750 gig hybrid drive. Before it retires it'll have a big SSD to help it out.
Our three Macs are integrated with our iPhones, iPads and Apple TV, and it is amazing how little time it takes to keep these running. No longer do I work for my computers, they work for me!
I'm sure you didn't need to know all this