Love both, and very excited for their next game, No Rest for the Wicked - which I don’t know if it’s been said explicitly, but is rumored to also be a Metroidvania.
I know it might be a little cliché, but I would still rank Hollow Knight as my #1 Metroidvania, but these two are my #2A and #2B, even after loving the new Prince of Persia. The level of polish is incredible and Wisps just cranked it up even more.