I put 4000 miles on a pair of Pilot Road 4 through all weather riding (including snow) and could not fault them in the least. I'd expect someone to get 6000 odd miles out of a pair on a Fazer 600. I did however change bike so cannot offer a direct comparison, but swapped over to a pair of Dunlop Roadsmart 3 based on an array of review materials into all round tyres for the 2016 season. It's difficult for me to compare both tyres directly due to the change of bike as well, but I have to say I do find that they offer what seems to be fractionally better grip whilst out in the cold or wet than the Pilots did. The longevity of the tyres is about the same as what I got from the Pilots with a comparable mix of hooning and steady riding on both sets. I'd recommend either of these for commuting and that you go for the cheapest pair of the two as they're both absolutely blinding to say the least, and are both absolutely superb in persisting rain as well.
The life of both sets is pretty rock solid when compared with the Rosso 2's which I got through on both bikes within 1400 miles.