Thanks Danner. Good to know. Do you notice any difference in ease of use or performance?
Both brands function equally well, no preference. Checked my stash, and I also have some Arista tissues in 8x10, and they work perfectly well too.
I do suggest using a quality parchment paper (like chef's use to line cookie sheets), and use it as your release paper. I get some French-made stuff from Sam's Club in the US. It won't bond to the dry mount tissues under the tacking iron. When I mount a photo to a mat, the emulsion is facing up to meet the heated platen of the dry mount press, and I put a sheet of parchment paper in between to protect the platen. You don't want to goober that up.
Dry mount is such an excellent way to mount photographs, it's a real luxury item in my darkroom.
Cheers and good luck.