I do a lot of writing using Scrivener, and switch back and forth on projects between my iMac and the iPad. On the iPad, I have used Scrivener extensively in split screen mode (usually with iBooks, but also Safari. I have also done a lot of writing in Scrivener not using split screen mode. When traveling for a few weeks at a time in the past three years all I take is my iPad.
I originally had a 12.9" Pro with the Smart Keyboard and travelled only with the iPad Pro. The screen is great and I did like the large size of the screen. However, even with just the Smart Keyboard, the package weighed well over two pounds–more than the weight of the 12" MacBook. I bought and used a back cover with the Smart Keyboard for protection, which made it even bulkier. I felt like I was carrying around a laptop.
The biggest concern I had about switching to the 10.5" was whether it was wide enough to really touch type on the Smart Keyboard. Turns out, for me, it was. There was essentially no adjustment time to the new keyboard size. I find the 10.5" to be nearly the perfect size for me. It is much lighter that the 12.9".
The 12.9" iPad Pro weighs 1.57 lbs. With Smart Keyboard the weight is 2.28 lbs.
The 10.5" iPad Pro weights 1.03 lbs. With Smart Keyboard, the weight is 1.57 lbs.
That’s more that 30% difference, and, for me, it made the difference.
I also quickly adjusted to the smaller screen size of the 10.5" and don’t miss the 12.9" size except when I used Duet. Turns out, Duet really isn’t that useful to me–I can live with my 27" iMac screen by itself.
The primary difference for me between the two is the really sleek portability of the 10.5 vs the 12.9. If I want to just hold the iPad alone, without keyboard, (which I sometimes do), the 10.5 is much more manageable that the 12.9.
So, having used both extensively both with Scrivener, and lots of other applications, I stuck with the 10.5 and have no regrets.