I just came from the Palm Pre Plus. You will be amazed at how dated WebOS feels. Don't get me wrong, I loved WebOS, but it is already showing its age. It feels to me like it has a windows 98 scheme to it with the colors and layout of email and apps. With that said, the lack of basic multitasking is the main thing that i'm not used to. Everything else is super smooth and lag free, unlike my Pre which, even overclocked, was sluggish. I would love to give WebOS another try in the future with better hardware, but handsdown I am really enjoying the freshness of Windows Phone 7 OS.
**Also, battery life is amazing on the Trophy. I can easily get through a full day with over 50% left on the battery. I would consider myself on the heavy side of a moderate user. With my Pre, I would sometimes only make it halfway through my day before needing to charge it. This can be blamed on my usage, or open apps, or any number of things. With that being said though, I do the same things on my Trophy as I did on the Pre and like I said above, phenomenal battery life.