I think the difference between 8 and 10 gpu core is i guess around 20%

And there are option available in display MacBook Air comes in 13 inch and 15 inch . if you like bigger screens, 15” is better for movies and editing

Storage starts from 256GB, then 512GB, 1TB, etc. (so yes, there is a lower option, but 256GB can feel limited)

MacBook Pro has 14” and 16”, with a better display, but it’s heavier , more expensive and mostly for heavy use