Board Thread:Naruto Discussions/@comment-31074250-20170410160032/@comment-26424744-20170411070402

Madara's Susano'o was actually stated to be capable of "reshaping all things in nature". Which is in line with the Ten Tails being stated to literally be the planet, the Sword of Nunoboko which was stated to be capable of destroying the planet, and Kinshiki who can split planets. Plus we have multiple moon to small-planet size explosions.

Kaguya is only Solar System level with the ETSB and likely reality warping. She is Planet level+ in all other regards.

You're also forgetting that Kaguya didn't want to kill Naruto and Sasuke. She wanted to take their chakra...