PSP VW2 and PSP VW (LE) why and for what?

We are including two versions of the Vintage Warmer 2 starting with installer number 2.1.4. It contains:
1) PSP VintageWarmer (LE) which is a direct descendant of the original PSP VintageWarmer with its all strengths such as low resource usage and latency
2) PSP VintageWarmer2, the main addition being the FAT double sampling mode for even more analog sounding processing.

We strongly recommend that you use the PSP VintageWarmer (LE) in all multitracking applications except situations where FAT mode is important.
The PSP VintageWarmer2 is recommended for mastering purposes and groups or master busses.

Regards
PSP team

What is the reason for still using VW1? Only to save processor usage, or is there some other reason?

VW1 has a lower latency then a fully featured VintageWarmer, sometimes it matters.

Regards,

Is this truly only compatible with Pro Tools 8?

I almost updated, then saw that...

-RayC

Only to save processor usage, or is there some other reason?