VHCS/ispCP vs cPanel

[fale]

Hi,
I've used VHCS for a couple of years, but after I moved to cPanel because VHCS was lacking updates. Now I discover the existence of this project and I'm pretty interested in moving to ispCP.
In the change between VHCS and cPanel, I did noticed a couple of differences.
The first (and cause of all the others, I think) is that VHCS does use virtual users while cPanel uses real linux users.
This creates some differences:
- different folders (/var/www in VHCS and /home in cPanel)
- ssh access (available with - I think - very little code in cPanel, and very secure too)
- user cronjobs are there
- many 'minor' others

Now I'm looking to ispCP and it seems to me that is using the same virtual users idea of VHCS. Is this right?
Which are the advantages of this approach?
It seems to me that all the programs (mail, apache, ...) are already using the cPanel approach by default (or installing a simple module, like mod_userdir)... wouldn't it be easier to implement? wouldn't be more reasonable to split data based on the owner other than based on the kind of data (mail, webpages, ...)?

Thanks for your responses,
Fabio