If you are rooted, yes. There are some custom ROM's that allow you to switch between lockscreen styles, or if you're adventurous and have the knowledge you could attempt to do it your self (I don't have the know how and I like the Sense 3.5 lockscreen anyway)
If you aren't rooted, there are a couple of apps on the market that change the lockscreen style. I don't see where any of them require you to be rooted but it's a mixed bag of reviews as far as lag and usability go.