Roguelites unlike Roguelikes (the lite and like parts are self-explanatory), have some progression outside the permadeath runs. The Binding of Isaac, Dead Cells, Hades... are all roguelites, due to having this permanent progression (unlocking new items, skills, increased statistics...) that carry on to new runs. Roguelikes don't have a progression outside of individual runs, so each run is a fresh start.
People who are unfamiliar with the terms just end up using them interchangeably.
People who are unfamiliar with the terms just end up using them interchangeably.