I never claimed it was equal, but just that EOCross+1 is definitely feasible most of the time.
ZZ solvers are (should be) x2y, so white or yellow on D, any colour on F. This gives you 4 EOCrosses to choose from. You can instead be neutral on any 2 F/B combinations (so you can solve with any colour on D, blue/green or red/orange on F for example) which gives 8 options, although this isn't really necessary imo.
EOCross distribution for fixed orientation looks like this:
View attachment 13925.
As you can see, almost every case is between 5 and 9 moves, so the spread is not much greater than 4-6 of CN cross and if you were x2y, that spread would decrease and shift lower.
Anyway, as you can probably tell, I would argue that it definitely does make up for it. It's close, but the faster pairs (from not having most of the bad CFOP cases or rotations) and faster LL make up for the 3-4 extra moves spent during EOCross.