You really should search this. But if you put on a back screen, and if you see some glowing around the edges, then it's the slcd. if you don't then it's the amoled. You may need to be in a dark room.
I did search about this before but I doubt the reports are all accurate.
My brother and me both have a Desire, but my screen is more "yellow" and according to reports, it means mine is SLCD. My brother's is far "whiter" compared to mine. While I have warm colours, his are more vibrant. Yet if I move into a pitch dark room, there's no glowing around the edges at all. Also, some sites said the SLCD uses more power but when my brother bought his phone, I did a test and mine lasted longer even though his had fewer apps installed and running. So yeah, not sure what to believe now. I know we have different screens but many of these stories don't hold up and I think some may simply be due to different hardware series/different hardware plants being involved, next to the actual screen.
