Interesting question but largely subjective. I use a Sony XZ Premium loaded with the BlackBerry apps and the Priv is more a back up than a daily driver. Works for me. I like the idea of the Note 8 with the dock to connect to a screen for travel.
The pixel has a strong CPU in it, huge amount of RAM and it gets monthly security updates the moment someone at Google clicks on the "release" button. (Pixels are on Android 8 already and just got a mid-September security update yesterday.)
However: It doesn't have any MicroSD slot. No dual SIM support (like the Black KEYone has). The fingerprint sensor is on the back which is kind of awkward for some people and it's also useless, when the phone is flat on a table or in a stand. The battery also doesn't last as long as the one of the KEYone. And it doesn't have a PKB.
I was using the PRIV until the charging port below decided to malfunction and around that time the New Gpixel came out so had to try it. No doubt the pix is a powerful device and with the assistant built right in makes it even more powerful. Loved it. BUT and this is a big BUT! For the life of me I can never get the accuracy right even though I know I type correctly on the touch screens. So for me in terms of productivity, the K1 is a better device for me.
Nick, how are you finding the Sony? Does the fingerprint reader work for you, or is it disabled? It's on my shortlist of next phones, so your impression of it would be appreciated.