Reports: Apple's U.S. Market Share Now 8.1%. Or is it 6.3%?

Dueling reports from Gartner and IDC show Apple (AAPL) grabbing a larger slice of domestic computer market in the third quarter of 2007, although the reports disagree about just how large that slice is.

Gartner has Apple's market share climbing to 8.1%, up from 6.2% a year earlier.

IDC also shows strong growth for the company, but by its calculations, Apple now commands a 6.3% market share, up from 5.7% last summer.

Their findings are summarized in the charts below.