PM edt and PM edt Concentrée share a common ground indeed (both chypre, oakmoss, coriander, citrussy opening) but aside that they are quite different beasts.
The classic PM is quite dry and very subtle and lasts not so long (on me probably a couple of hours). The Concentrée is sweeter having hints of vanilla in the base (but far from being a vanillic cloying monster) and has a stronger (and very good) cedarwood note make more sparkling by a generous dose of coriander spicing it up.the opening is still lemony and fresher but this juice has a full bodied 80's precence, so you don't need to bathe in it to make it work properly.
Moreover while the classic PM is more suited for summer, this one probably gives its best with the cold season. It's anyway a well done full bodied male chypre and if you like PM you might like this version "on steroids". I do like it.