10 - inch Tablets Form Factor Fair Market Share Comparison

Can we have a fair comparison between 9/10-inch tablets form factor comparison between IPAD, Win RT and Android? I hope someone can help and to give us some estimation or prediction of this.

Ipad: since the selling of Ipad mini Apple is shy to differentiate it's Ipad 4 sales from Ipad mini. Why?

Win RT: Surface RT sales in last four months is predicted of 1.1 million + other OEM ? = ?

if the Win RT win 5-10% of 9-10 inch tablets form factor market share, would be call if fail or success!