I did some pouring w/ both the Paico and Takahiro, but why I didn't think to put my modded Bonavita out for the test-drive I'll never know.
While I found the Paico could do as slow a trickle as the Tak, it was far less easy to do so. It was like a knife edge w/ the Paico; a little more water and it was too much, just a little less water and it was dribbling. So I'd give the thumbs up to the Takahiro for fine control because it was far easier to hit the fine stream and had a wider sweet spot for that tight control. While the Paico can do it, it would be very difficult to do the fine stream while move the kettle around and aiming at different parts of the slurry and/or bloom. When they were empty, the Paico was noticeably lighter, but still didn't feel flimsy or poorly made.
If I had the funds and thought I was going to need a kettle that would last my lifetime and be handed down to future generations, the Takahiro felt it was up to it and would be my choice.
All that said, I believe my modded Bonavita is even easier to pour w/ than the Takahiro. But again, if I was doing a pourover or three every day for the rest of my life I'm sure I'd be buying a new Bonavita every so often and the Tak would be sitting there proudly with a smirk on its spout, as that thing ain't never wearing out.