I believe you're misreading GP's comment and/or the associated graphs. The graph with 4x performance increase is comparing a MacBook Pro (Intel) with a MacBook

I believe you're misreading GP's comment and/or the associated graphs. The graph with 4x performance increase is comparing a MacBook Pro (Intel) with a MacBook Pro (M1). GP is comparing the MacBook Pro (M1) results in said graph with the Mac Pro (Intel) result in the following graph, where the Mac Pro is roughly 2x.