It may be £25 in pure repayments, but petrol, insurance, tryres and tax will all be more expensive as well. Also a straight comparison in monthly figures should not be used in isolation to compare deals - there will be other factors under the surface like GFVs (which don't reflect the real final value) etc.
The S is fantastic fun yes, but for me it worked out about 25% more expensive over the three years I'm having my car (or £2,500), which I can't really justify at the moment given the excellent performance of the Cooper and the fact I've recently bought a house which I'm doing up. At the end of the day though, you can't rely solely on hard facts - your heart has to come into it too.
Have fun deciding!
