That's an awfully vague assumption to make, considering that GB generally makes consistently decent VRMs on everything above their rock bottom SKUs, ASRock's mATX power delivery is the laughingstock of X570, and MSI is the only vendor who can't make 128Mb BIOS chips work with fully fledged BIOS.
Whichever product works for you is the right one for you, at the end of the day. Objectively speaking, Gigabyte is slightly on the better side of vendors when it comes to releasing new AGESA BIOSes, slightly. That's a good thing for a platform where AGESA updates are of significant importance.
Which makes me simultaneously excited and apprehensive about 1.0.0.4, as I want to see what AMD has in store, but also am hesitant to do another BIOS flash that I don't exactly need. AMD's changelogs as of late haven't been particularly helpful.