The advantages are snapshots and the same settings you get with virtual box.
The ms version mainly is designed to let you use xp apps
With the virtual box vmlite you are getting the same experience you get while using 2000 in other words full featured virtual box that you have with 2000 but now it will be xp.
the shared folder if you set it up is safe enough..I used xp to test many av solutions using the virtual machine
never infected my 7.
I got my copy of 7 ultimate free from Microsoft which does everything pro will do as far as I know.
I agreed to demo (house party)w7 after receiving it.
I will go to the PC after this post and get you the version number of vmlite..it is older as I had no reason to update it.