Oh come on, you're not even trying :-)
Microsoft's sentence is a compromise written by a committee. Apple's identity statement is beautiful (even if you don't agree with it) and I would be shocked if there were more than 3 people involved in the whole process of its creation.
Each sentence starts by drawing focus to an ideal of the company, and then mentions products Apple makes according to that ideal.
1. "Designs" instead of "makes" shifts the emphasis immediately to the abstract, away from the mechanical process of assembly. There's a contrast drawn between the "personal" computers and the "professional" software. "Personal" describes what the computer is, all the time. "Professional" is just what the computer might do, and it goes away when you're done with it.
2. "Leads" would be a weasel word when relating to some market segment, but not when it's paired with "revolution." Apple styles itself as a moral leader, not a business leader. "iPods" and "iTunes" are mentioned separately, maintaining the being/doing dichotomy.
3a. Abstract "reinventing" is the goal here, even though physical phones are the medium. The author realized that claiming to also lead this revolution would sound redundant, but couldn't resist using the word "revolution". So he used the adjective form "revolutionary". This is someone whose aesthetic sensibilities, acute though they are, can only minutely deflect his drive to get the word out about these revolutions.
3b. All the verbs so far have been ongoing (present progressive). The past and future are relegated to the last half of the last sentence. "Has... introduced" is technically past perfect but the adverb "recently" pulls it back toward the present. Even "the future" in this sentence is merely a noun, preceded by the present progressive verb "is defining." "The future of mobile media and computing devices" is the only category of product hanging without an Apple product to exemplify it. In this statement of identity, the distant past does not exist and the future is not fixed.
I typed all this at midnight, so it isn't very good or very thorough. But you get the idea :-)