Details about HTC's first Windows Phone 7 smartphones have been leaked online through a XML database from HTC' official MMS setup webpage itself which said that both will be running Internet Explorer Mobile 7.
No firm information have emerged other than the fact that they will have physical keyboards, Bluetooth and capable of displaying 800x480 pixels. It is likely that the Mondrian - which is a codename - will feature a large 4.3-inch touchscreen with a Qualcomm QSD8650A/B Snapdragon processor clocked at 1.3GHz.
Some rumors also point to a 5-megapixel camera capable of recording HD content with GSM and CDMA support which implies that the phone will be rapidly deployed both in the US and in Europe. Whether the Mondrian is the same HTC Gold that surfaced last week remains to be seen.
As for the HTC Mozart, it could well be a mainstream or entry level model Windows Phone 7. It would be interesting to find out whether HTC uses a common hardware platform for Windows Phone 7 and Android OS.
Expect both phones - as well as a slew of other Android-based models - to be launched towards November 2010 with Android OS 3.0 likely to be launched in October 2010.