The only problem you'll run into after the install of the second copy is when the boot screen comes up...
You won't know which is which because you'll see something like the following when it allows you to choose between the dual boot OSes:
You mean this guy?
Jeff Bone is the founder and chief technology officer of Austin, TX-based Deepfile Corporation where he ponders the mysteries of filesystem management. Previously he was the founder and CTO of Activerse (early pioneer of buddy lists and instant messaging) and of Active Paper (developer of one of the first mobile / PDA-based e-mail clients and Web browsers.) In previous iterations he has delivered pizza, been a nightclub promoter, and done time at Sun and Dell. When not compulsively starting companies, obsessing about software architecture or making trouble on various mailing lists he likes to cook, invent perpetual motion machines, and watch trash TV with his sweetheart of 6 years, Jennifer.
That was google to the rescue. Nope, don't have a clue who he is