Yep, there are highland and lowland Nepenthes, as well as intermediates. The only way to really tell the difference is if you know your plant's species; something like Nepenthes hamata is considered highland, something like Nepenthes fusca would be considered intermediate, and something like Nepenthes ampullaria would be considered lowland. As for the difference, they're native to areas of different elevation. Lowlanders tend to have high temperatures in the eighties or nineties, whereas highlanders have much lower temperatures around the seventies, as well as a nightly temperature drop. Both types both require their high humidity.
And don't worry about noob questions! We've all asked them before.