Icnoic Apple Inc. founder Steve Jobs died of cancer four years ago. The tech titan has left an indelible mark on Silicon Valley and on personal tech gadgets like the iPhone and MacBook.

In other words, he’s cast a long shadow over his successor, Chief Executive Tim Cook. Although Cook has stepped up to the challenge, one chart that has made the rounds in Twitter TWTR, +8.50% suggests that one of Apple’s fiercest early rivals, Microsoft Corp., has outshone Apple over since Jobs’s death — at least in terms of stocks returns.