The second round of Totem basics have a number of improvements. Most notably, the trigger wire has been reworked with a very durable thin diameter cable. The fabric sheath from trigger to cable wire assembly is flexible and seems more responsive then the wire style. I haven't measured but the head seems narrower. When I pulled the pin out of the crux of West Face of El Cap, the totem offset was the only cam narrow enough to place in the pin scar. I like the cam lobe surface too, I don't have much confidence in the surface of the Fixe ones.
The Blue Totem cam seems to fit in even narrower spots then the Green Alien does. Basically the Totems are the best cam ever. Such a radical departure form anything else. Go climb El Cap with them and you will be sold. I use them for free and aid equally. And for free climbing they don't walk as they exert much more outward pressure on the crack. Got mine at Mountain Gear, but talked to Larry from Mountain Tools about their strategy and apparently one of the founders died and they continue to struggle to fill that hole. Orders are coming in too fast to fullfill.