DIfference between Reusable FM for ALV display and ALV display using class

Hi,

Is there any difference between alv display using Resuable FM and ALV display using classes except the later one uses OO concept.??

One mere thing i want to clarify is that is there any difference exist between REUSE_ALV_GRID_DISPLAY and REUSE_ALV_LIST_DISPLAY? If so, then let me know.

It could be easier to understand me if yuo give scenario where these FM comes into picture

Regards,

Parag