Office 365 is good, one need to negotiate hard for good pricing though.
O365 is good, but pricey. O365 has better Office productivity apps (powerpoint, etc.). Gdrive vs OneDrive is a tossup. I'd probably favor OneDrive as slightly better. Exchange and Outlook is WAY better than Gmail. Teams is better than Meet and Hangouts for video conferencing, but Teams is terrible for chat/collaboration. Teams is basically a Slack wannabe done poorly. I will say definitively that the security in O365 is way better than Gmail and this was a big driver for us to migrate off Google, BUT MS charges you for this. You get way you pay for I guess.
G-Suite has horrendous insecure runaway permissions. We moved to o365 and never looked back.