Yep it's rumours I'm basing my opinion on. That's why I said we'll need to see the full specs. But the rumours I've read are LCD screen and same cpu as the Desire. I think the LCD is almost certain due to a deal with Sony for a shit load of LCD screens.
It's more than likely an cousin to the Evo/HD2 family of HTC phones, ie. Snapdragon and 4.3inch LCD.
Anyway Totti, I have an Xperia X10 which I got in April, but when I saw my friends Galaxy S the other week, my heart sank. It was vastly superior to both my X10 and the Desire. The screen was breathtaking, and how they packed an internal memory card and made the phone super light was astounding. Combine that with how powerful the cpu is from Dirks posts.
Basically, the phone blew me away. I had to get it. Hence I'm still gushing with my praise, there is no reason in my opinion to buy a Desire or X10 over the Galaxy unless you need a camera flash.