I have a question: if the OSX that came with your Mac is optimised for 'your Mac', does it means the retail one isn't as optimised as the one came with the Mac?
Actually, the retail disc optimizes for any Mac out there. Apple makes the discs shipped with a Mac (basically OEM discs) to only optimize for the Mac it ships with.
I don't get it.
Does the retail disc checks the model of Mac you have and selects an optimised kernel for it or something along those lines?
Is the retail one 'as optimised' as OEM one's?