As the Samsung Galaxy Tab officially hits stores across the UK today, an online faux pas by network provider T-Mobile has seemingly outed a 10-inch model of Sammy’s iPad rival.

The page, which appeared on the T-Mobile website before quickly being taken down, touted a seemingly new breed of the Samsung Galaxy Tab, not only sporting an iPad comparable 10.1-inch screen but running Microsoft’s Windows 7 Starter Edition operating system.

The first Samsung Galaxy Tab is today hitting the market in the UK as the 7-inch Android 2.2 powered pocketable tablet is launched across a number of network providers and with a number of Carphone Warehouse stores opening early in expectation of keen interest in the first true iPad competitor.

Like the launched 7-inch model, the leaked 10.1-inch Galaxy Tab is, according to the T-Mobile spec sheet, still to sport a 1024 x 600p resolution display. Other than that, however, the new 10-inch device appears to be a step forward in tablet computing with a 1.66GHz processor, whopping 160GB harddrive and 1GB of DDR2 RAM.

Whilst this improved and enlarged Galaxy Tab is yet to be mentioned by Samsung and UK pricing and release dates are but a pipe dream, this leaked specsheet opens up a lot of expectation in what is becoming a fiercely competitive and crowded tablet market.

Stay tuned to T3.com and the T3 Twitter and Facebook feeds for all the latest on the expected 10-inch Samsung Galaxy Tab.