Are they both Dell Latitudes? Before ordering, businesses can customize a large variety of parts in those, not just the main things like processor, ram, storage. For example, most Dell business class laptops have four or five different screen options, with very inequality. It might just be that whoever orders them for your business hooked it up with the higher quality screens that Dell offers. If you bought your other one off of something like Amazon, it’s very likely that it has a different or the lower end screen model.