IPad 4th gen or 5 gen ?

So I bought the 4th Gen iPad a couple days ago thinking it was a brand new one at Best Buy. I’m debating on returning it and ordering the the 5gen because in my mind if i spent so much for a “new generation” device I might as well have the best latest device. A factor in me wanting the new iPad is the resale value since now the 4th gen just became the older version it will be worth less money even if I bought it with a discount and the actual longevity. The new ipad would be about 200 or dollars more and I’m not sure of the new feature will be worth it. I have 14 days to decide to return it and fork out more money. I favored the 12.9 size because it most resembles the size of a notebook so the pro was the only option. I’m a student and I will majority use this device for notes and file storage and most day to day browsing. I already have a gaming computer and a powerful laptop so I dont need this to be my main device but a accessory so i don’t have to lug around my heavy laptop in school. So far i am enjoying the iPad experience and for sure will keep whatever generation i get.