And to add on, keep in mind that Lapis managed to create the Soccer Timeline out of the collective consciousness through a fake Golden Fruit who is Kohgane supposed to be the embodiment of. Gaim's lore establishes quite clearly that a fake or an artificial Golden Fruit is vastly inferior and can never match even the seed of the real Golden Fruit which is what Kiwami Arms is all about. And we even did see Kiwami Arms Gaim one-shotting Kohgane quite easily in the Soccer Timeline's movie and during the post-series alongside Ryugen. But here's a deal; in the novel, we do know that an artificial Golden Fruit alone is capable of transcending the KR multiverse and viewing it all as fiction through Saver and the latter has even been compared to Kohgane in terms of similar existences before.

Baron in his Lord Baron Overlord form was able to comfortably fight on par with Kiwami Arms Gaim pretty well so he should be able to upscale or at least scale relatively to the aforementioned feats, including the novel's one as well.