I wasn't going to reply but as I've been mentioned personally...
It's very easy to cause confusion talking about Michelin's as their tyres have very similar names- out of the two people you've been talking to one might have made the mistake of not talking about the same as the other!
I've not used the pilot Road 4's yet, I am due to replace rear soon and shall be trying them out!
That being said my experience with the pilot Road 3's was superb, mileage was incredible, the 4's are supposed to be better still- not worse as one of your guys has suggested!
Reports are the metzelers are possibly better- but you haven't asked that, I have tried many any different makes over the years and as is most people's case I've now find the tyre maker I am happy with ( currently on the pilot power 3's as wasn't using the bike to despatch on, but going back to lots of motorway commuting!)
Tyres aren't cheap which makes people reluctant to try a different brand, but it's worth trying!