This is Naruto from episode ~80 of the original series, so to be fair let's take Boruto from episode ~80 of this series. That's in the middle of the Mitsuki disappearance arc. RIGHT after he got his karma, and before Kawaki showed up and started hastening his Otsutsukification through resonance.

So he's gonna be able to use what, like 5% of Momoshiki's power? Momo definitely isn't going to be able to possess him fully.

If we're pitting the Boruto from episode 200 who fought against Boro, then there's actually no straightforward comparison to kid Naruto because the series was filler from episodes 136 to 219, meaning he didn't really develop in power -- and after that it was straight to Shippuden