The "new" regular ones are 525ss.
I don't have the creamer, so I can't compare. I can say that I can get a nice head on a 10ft 3/8 line at 12-13 psi with the right pouring procedure. Maybe those creamer ones would be helpful for a stout though?
“While the rest of the species is descended from apes, redheads are descended from cats.” - Mark Twain