IshowU HD vs. HDPro

Can anyone tell me what the advantage would be to using HD vs. HD Pro? I know HD pro specifies specific support for Final Cut but I tested the trial version of HD in Final Cut and it seems to work fine. I'm super broke so I'd like to get the HD version instead but I don't want to run into problems in the future.
Please advise.

Thank you!

you can always upgrade in the future for just the difference
they have a chart with all the differences here
[www.shinywhitebox.com]

"Papa" Sean