I've owned Ions last season and Imperials the season for that--fit is exactly the same. I haven't tried on others like the Ambush and Moto, but based on appearance and handling them, I would venture a guess that they are about the same too.
15 LibTech TRS HP . 15 NS Snowtrooper . 15 NS Ripsaw . 13 Salomon Pow Snake
15 Now Drive . 14 Now Drive
14 Flow Hylite