Which group was fired first? I have a sneaking hunch that at +1400f/s, the Aguilas deposited some metal fouling, plating or lubing notwithstanding, thus affecting their accuracy. How'd the CCIs group after you adjusted the sights and after the Aguilas?
As a general rule, seems hard to beat Minimags anyhow. Again, as stated, unless you're going with target-grade standard velocities.
100 yards is really pushing .22 rimfire anyhow for hunting effectiveness. In general, I won't shoot anything larger than a squirrel with .22s. My point here being that the grouping for Aguilas shown is adequate for closer ranges on game slightly larger than a squirrel. And if you're just plinking at beer cans, you don't need all that velocity.
Mere velocity ain't everything.
Terry, 230RN