You will, easily. The VUS aren't that tough really, which is why they provide outstanding feel. The MPSS give nigh-on equal feel, but last a shed load longer.
Really, unless you are stone broke and cannot afford the extra £200 to even chuck on a credit card for a couple of months, there is no reason not to fit the MPSS these days. They are the best tyre available in all departments, full stop.
If you're not going on track it doesn't honestly matter what tyre you have as long as they can handle the wet and they're in a set all round. I feel that chucking on MPSS (yes, they're an excellent tyre) might be overkill if its purely for going to and from work, going to see family and friends and maybe a short stint of twistys and the excess cost could be used on fuel or service.
Just my 2p - I'm sure I'll be shouted down!
Nope to be honest you are most probably right, but say on one of those twistys you go round a blind corner and find something you didn't expect, not saying better tyres would save you but they could and that was always good enough for me. I never set tyre on a track but in 3.5 years spent £1.6k on rubber, small change really in the grand scheme if things....