Del Toro is more explosive and a better classics rider overall (his ease on gravel, for example, is tremendous).
However, Ayuso isn't far behind him in terms of climbing explosiveness, especially on climbs longer than 5-10 minutes, where I feel Del Toro is almost invincible. But in a sprint after a 20-30 minute climb, I'm not so sure about the difference between them.
Then it's clear that Ayuso is the best time trialist, and in my opinion, his w/kg on standard climbs (20-30 minutes) is also slightly superior, although Del Toro, on Jebel Jais, demonstrated a level similar to Ayuso's usual performance on those types of climbs during the spring months.
In Grand Tours, both leave doubts, but I still think that without the crash that changed everything on the gravel stage, Roglic and Ayuso would have dominated the Giro ahead of the three who made it to the podium. However, Del Toro has improved since then.
Final verdict: They are very evenly matched, but I think that in a week-long stage race with a significant time trial, Ayuso remains the favorite. However, I think the opposite is true for a one-day race.
Ideally, Roglic would recover the form he showed in last year's Volta a Catalunya to better measure both Del Toro and Ayuso at the Itzulia Basque Country. I still think he could teach them a lesson.