I use voice dictation quite a bit and I haven't really noticed a difference between Siri and Google Assistant with respect to accuracy. I'm not generally in noisy environments though.

I'm very much a software-first person. I bought the iPad to run GoodNotes. It's the only good note taking device I've ever owned. Since then I found Procreate and use it all the time as well. It's an amazing program.

My phone is used mostly for voice calls, text messages, maps, and listening to podcasts. I want to run Things and Overcast on my phone and that's my primary motivation for moving to iOS.

As far as notification go, I generally disable them. I want to know when I get a text message and that's about it.