I have been using the original raised and flat mouthpiece on my early Pax 2 model. I was never really that keen on either of them and found them both to be a bit hot and harsh. This newer 2nd generation raised mouthpiece is a big improvement for me. It draws much cooler and doesn't feel as harsh. I like it a lot, great upgrade if you have the OG Pax 2 raised mouthpiece.
I like options and the better the options with quality products give me a better experience.