If there is no resolution difference between Platine and Hahnemuhle Photorag Baryta on the Epson printers then I certainly wouldn't use it.
Like people have said, the gamut and dmax differences are marginal.
But on my IPF 8300 there is a significant sharpness difference. So much so that my client has made reprint an entire body of work, which he is paying for.
After working with this Platine for one big roll, I don't care for it either, and I am reminded why I never went with it when it first came out. There is too much bronzing with my Canon inks ( not the HP inks though ) and they absolutely have to be sprayed. The worst part is that after half a roll is used up you start getting major head strikes. Not good. So then I had to cut the media into 22x26 inch sheets, flatten them in the dry mount press and run as sheet media. A pain. If I"m going to do 30x40s I would have to cut them up and flatten them under weights for like a week to use it. Like the other Canson Baryta and the Ilford Gold Satin, it shows marks in the white border areas really easily, another reason to have to spray them. That is ok if they are going behind glass in a frame, but entirely another situation of you making a portfolio that is to be handled.
So, in conclusion I'm not going to stock this Platine but will only use it for those who come to me insisting on it, which is one person so far. The resolution difference is not worth the other drawbacks. The Hahnemuhle papers are so much easier to deal with.
John