I own an both the large iPad Pro (128 GB storage model )and a 6th gen iPod Touch ( 64 GB storage model, which is pretty much an iPhone wiithout the phone.
There are a LOT of things I could never/want to do on my iPod Touch that I can do with ease with my standard size iPad and my larger screen iPad Pro with double the RAM of all the current iDevices.
I am a creative and drawing on the small screens of iPhone, iPod Touch and to a significant degree the iPad Mini models were never big enough to more naturally sketch/draw/paint on.
I like my larger screen iPads for all of my various drawing apps, music performance and sound apps and even for reading my eBooks and eMagazines.
I like the bigger screen real estate for note taking and idea taking apps, too, over smaller screen iDevices.
It comes down to your personality and personal preferences.
Are you a iPhone/iPod Touch type of user OR are you an iPad user?
I am, squarely, an iPad user.
I use my 6th Gen iPod Touch mostly for storing and playing my large music library and for FaceTime/Skype calls, some games, sometimes as a passive GPS and use this iPod Touch sync'd up. with my smart watch, at that is it!
I use my iPad for everything else and any heavy work/project loads, basically, using my iPads, and especially my iPad Pro, as pretty much a laptop
replacement.
I, also use my iPad Pro with a wireless, visual drawing tablet app for drawing directly from my iPad Pro to my Mac.
Lots of wonderful things you can do with a large screen iPad that you simply can't do on smaller screen iDevice.
What are you expecting/planning to do with the large iPad Pro if you have no interest in purchasing an Apple pencil?
Have you considered the smaller 9.7 inch screen iPad Pro model?
You'll get a standard size iPad with many improvements over the 12.9 inch model, if you are not sure about the larger size iPad Pro model.
It will weigh less, too!
The large iPad Pro weighs almost 1-1/2 pounds.
There is a significant weight to the larger iPad model.