How can it be up to me to prove your non factual claim to be wrong
The old eagle F1 and the new F1 supersport are two completely different tyres, futhermore for two different segments of the market. One being a sports/comfort tyre and the other being a Ultra High Performance tyre.
It's just isn't factual to make up a claim about a pair of tyres, going of past performance of an previous tyre. It's like thinking all old 911's handling and balance was rudimental, so all 911's after the 993 will be pigs too. Again just not factual to make that assumption prior to testing.
Again the professional (reviews tyres for a living) tyre tester from tyre reviews online stated from his experience, he cant see any reason why the new F1 supersport shouldn't last equally as long as the MPS4S.
I have MPSS on the rear of my 305z and MPS4 up front (18' RAYS) and they are both great tyres. For my 19's I went with the Continental SportContact 6 which look great.