My pair of 4.0's lost their cushioning after maybe 10 solid wears. They began as my most comfortable shoe and then slowly degraded. I ended up selling them.
I don't have them yet but the consensus seems to be sizing up half.
There are clear differences in the aesthetic. Lunar2 has a Lunarlon sole, Trainers and Racers do not. Racers are lighter than Trainers. The knit is also significantly different.
Finishline at the Del Amo mall got them. Not sure if Footlocker got them or is going to. Called Footlocker at the Westfield Mall in Culver City and they said they were not receiving them.
Got my pair awhile back.Tried to make them as close to the HTM's as possible and been wearing them a lot lately. Colored in the stitch marks red with a Sharpie lol.