Misako and Kyoko scale from 0.04 Tons while Kimiko and Annie scale from 0.054 Tons, so a 1.35x gap in favor of the latter
Looks like they're at an AP disadvantage, but this isn't anything they're not used to because they spend a lot of their boss battles at an immediate disadvantage, yet also manage to come out on top, even in doubles fights. That being said, they're more used to working as a team and their coordination together should be better than Kimiko and Starlight's considering over the course of the two games, they canonically fight all of the enemies they face as a duo. They're also used to fighting matches like these. They can fight Hasebe and Mami, who are basically their rivals, at the very end of RCG1, who have their own team attacks and coordinated movements and still effectively beat them down without breaking a sweat. They did the same in the second Ken fight in RCG2, where they had to fight three coordinated individuals at once. Not only can they combine fighting styles and do some crazy martial arts to juggle them into combos, but on the account that one of them dies, the other can simply kick their corpse so they come back to life with health.
The River City Girls deal with projectile spam all the time, on levels much superior to Starlight. Not to mention, they also have experience beating down people who can regenerate. I personally don't think Noir and Stormfront's experience holds a candle to the girls, and your explanation as to how is very vague.
