It’s basically the 10.5 inch iPad Pro with a new processor and a new name. Why change the name?
Because it doesnt have that fast fluid Display as the 10.5 Pro. That ProMotion Thing which gives a better experience when writing with the Apple pencil.
They basically tried to cook with old ingredients in a way, that the new Pros are still their best iPads and at the same time justify a higher price than the cheapo iPad. (Throw in True Tone Display that nobody needs, Stereo sound, use the 10.5 form factor from the old 10.5 Pro as an "upgrade" to the 9.7)..
It's basically Apple in Tryhard mode. Besides they earn more money from this than the cheapo iPads. Apple doesnt want to make Peanuts.