Honestly, no. Elixirs are not really like anything else, IMO. NYXLs are nice, though. I don't know what process makes them NYXL, but they feel more like annealed string than coated strings, if that makes sense.
I suppose the core of the string is different. I just looked it up and it seems to be some hexagonal thing. Not sure how that changes the feel of the strings.
Digging through my toolbox I found a .064 and 0.68 string and I have a pack of 10-52s... I suppose that will be fine for A Standard on this 7-string since it's essentially D Standard and that's the gauge I use for it on a six string.
Not sure if the 68 will be too far from the 52 in terms of feel. I believe what's on the guitar now is a 56, but I could be wrong. My caliper doesn't go beyond 2 decimals.