Source: Company reports

Four years ago, Microsoft MSFT pulled in nearly $6 billion more in sales than Apple AAPL . Now Apple’s is total revenue is $4.1 billion bigger than Microsoft’s.

Meanwhile, Apple’s market cap, which overtook Microsoft’s in May, continues to outpace Redmond’s. The total value of its shares now stands at $279.6 billion, compared with Microsoft’s $227.4 billion.

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[Follow Philip Elmer-DeWitt on Twitter @philiped]