There are a lot of paths that are unique to each of them. I bet the reverse (from Gimp to PS) feels the same. My wife asked to make a logo and a leaflet, and I never offered other thing than Inkscape. She ended up using it for almost anything. After a couple of years I bet that she will find Illustrator frustrating.
The difference is that after a week of serious Photoshop training you will have at your fingertips a world class, incredibly powerful piece of software with modern ML tools for smart image manipulation, collaborative tools and cloud infrastructure for syncing documents, plus a massive ecosystem of plugins and assets available to purchase.
I say this as someone who strongly dislikes Photoshop. I wish I had a viable alternative.
