I actually use the double tap feature way more than I expect to. I also prefer the texture of the 2nd get pencil. Of course the magnetic charging is WAY better in my opinion.
As for as writing goes. That's really up to the iPad. The latency on the pros makes for an incredibly smooth writing experience. I have no clue what the latency comparison between the pros and newly released iPads is. However, I didn't have any issues with my gen one pencil and gen one pro.