Donka
macrumors 68030
Pro-artist? My worry would be how well this thing is going to handle, for example, Affinity Designer or Affinity Photo or even Procreate running split-screen. 2GB isn't an awful lot when running two pro-level, fully featured creative tools side by side. Especially if you're creating artwork with a large number of layers. I'd say the 9.7 may struggle with it, while the 12.9 inch would handle it with aplomb.
Affinity Photo is one of the upcoming apps I have my eye on. This could allow true professional photo editing on the iPad and as someone who does a lot of 24MP RAW editing, I know I would rather have 4GB over 2GB. True the 12.9" device has the bigger screen for editing but I'm more likely to have the 9.7" device with me so that would be my first choice.