According to this guy's various interviews over the last few months he's trying to integrate a lot of G-Suite services together into a single offering, so it won't just be the icons that are the same. Who knows, by the time the antitrust case comes close to any sort of conclusion they might actually have a single product that can't be easily split anymore. He's even trying to add in "anticipatory experiences" (his words)[1] that make the product feel like it just gets the work you're trying to do. This obviously plays directly to Google's strengths as an engineering and ML powerhouse, and who knows maybe that'll be an argument they can make too.

1: https://www.protocol.com/javier-soltero-google-microsoft-int...