Lengthwise, the two ski about the same.
As others have mentioned, the Squad is much stiffer.
Yes, the 184 Squad has plenty of sidecut to rail hardpack. In fact, that's where I find them to excel.
There's not much comparison to be done between one and the other here as you are talking about horses of s different color my friend.
Bottom line, Squads for hardpack and crud or EHPs if you are in softer snow a majority of the time.