I bet no one saw that title coming! This isn't a vs post, but more of a general comparison between the two. I spotted this video recently that paired up the two phones next to each other. I was quite surprised to see that besides the fancy shell, the Lumia 800 looks pretty much the same as the Flash.
Samsung Omnia W (Focus Flash) Review - YouTube
Comparison is around 0:50
Samsung Omnia W (Focus Flash) Review - YouTube
Comparison is around 0:50