Doubt there will be much difference durabilitty wise between the Collinite and EGP, both are pretty durable, if they are already wearing Collinite I would be tempted just to add another few layers of that.
If you do go down the EGP route as Justine says you will need to apply the SRP again first. I tend to do a couple of coats of EGP and then use a wheel wax ontop.
Steer clear of the PSOOC stand tomorrow ...
I avoided cleaning it all day !