No no, Santa Quetz's NP, which is her dropping a massive gift, and is compared to the meteor drop of the Yucatan Meteorite.
The Gugalanna one is basically Ishtar thinking of using Gugalanna to stomp the Summer Race Singularity event. Mash and Da Vinci say that is too absurd because it is overkill, with Da Vinci specifying it would wipe out the entirety of Connacht. This should be comparable to Ishtar's Second, unused NP, which makes her summon the Bull's Hoove to stomp someone.
Ishtar's calc is
this one, where she makes a 20 km deep hole by shooting her NP at Uruk, dropping Tiamat into the underworld. Pulverization was assumed because there's no debris to speak off after the fact, though vaporization was discussed since her NP is shown heating things up enough that it makes lava burst out in an instant (I don't entirely agree with this, but meh, I guess worth mentioning).
Gugalanna's hoove, by the way,
is an A+ Anti-Army attack. And Santa Quetz' is a
A Rank Anti-Unit.
Arondight really doesn't feel like a good measuring stick either, since it does many things besides boosting Lancelot, and the implication is more so that Lancelot stalled the fight mostly by skill, like Sasaki against the much stronger Saber.