IBM is a consulting company and courts mid- to upper-level manager types with purchasing authority. After few seconds on the page you are invited to speak with a sales consultant via a popup.
Apple is focused exclusively on the (premium) consumer space.
Both companies represent top-down totalitarianism (I say this without value-connotation): IBM suggest corporate command and control, Apple has a well-curated walled garden.
Microsoft's site reminds me of one of the more effective university websites.
Disclaimer: I have no affiliation with any of those companies except as a consumer. My iPhone is my favorite toy.