Quick Comparison iPhone 11 Pro Max, GoPro Hero 9 and Zoom Q2n 4K

I currently find myself in the possession of an iPhone 11 Pro Max, GoPro Hero 9 and ZOOM Q2n 4K. This video is an extremely quick - rough and ready demo of each whilst I play the Kawai ES 920. Listening to the playback, there's not much in it. Each product has its uses, though I'm looking at it from the perspective of vlogging. So sound and picture are paramount and ease of use. In hindsight, the iPhone 11 Pro Max does an excellent job, it handles the light and sound in my conservatory very well, and file transfer done via Airdrop (really easy) to my MacBookPro. GroPro Hero 9 is probably my least favourite sound recording (but it is an action camera built for extreme activities - not recording piano playing - I still love it though!). ZOOM Q2n 4K has the most natural and high fidelity sound but requires better lighting as the picture is dark - next time I'll use some lights! What do you think?