( I use daily your SN57 IR from Axe-Fest Germany 2014, but it was not this one in this case ; back to topic Pack Marshall 2015 !)
All the variation I, P, H, ...are interesting, just because they provide us with different sound colors.
You know, I just try to find a sound I like for my backtrack, and I don't really care if it is marshall, vox, or other thing.
Of course I tend to look at first in Vox IR or other IR I like, but I am happy if I can find something other.
But I must admit I almost never make IR mix by myself. I just use it as final EQ, more or less.
Because of that, I am happy that your provided some ready to use Mix !