@Philpug please explain it to me as if I am a below average Golden Retriever.
The hard mount Attacks all have, I think, a 5mm heel-to-toe difference. I have a lot of them and it works for me. When I look at the specs on the Protector Attack it's a 4mm difference. If they make the toe TALLER it would be less like the non-Protector version. Obviously the stand height is different, but for consistent delta- 1mm is probably hard to detect and not worth re-engineering a binding solely for that.
Is what you are saying that if they make a hard mount Protector Attack and use the existing Attack fixed mount toe piece that it would be too low relative to the 33mm Protector heel? Yes, for sure.
What I am trying to understand is what the point of a fixed mount Protector Attack is. If it can't address stand height I'm not really sure what good it is. The tracks don't add much weight at all, and it seems like in the case of the Protector they don't really add any height either (take out the track and you'd need to put a spacer in the heel to achieve the 33mm you need to clear the brakes in a lateral release).
Of course, I get some people count weight in grams. However, I'm the guy who used to have a gear room full of Neox bindings and in some ways still miss them. So I'm not that guy