General usage – there’s not much in it, IMO. SSDs are the massive upgrade, once that’s done there’s not much noticeable, assuming build quality and screen are the same.
BUT if you are doing 3D and CAD, you might notice the increase in performance from the CPU.
I’ve recently bought 40 of the latest gen Lenovos for a client, they have a metal case which helps avoid flex (flex can wear / kill a laptop) and they seem pretty nice
My first ThinkPad in this job (early 2010s) had a metal chassis, with a plastic case. When I dropped it, the laptop was fine but the corners of the case smashed and splintered, I had to glue the bits back on for cosmetic purposes 🙂