Do I need a dedicated part to my model?

I have macbook air A1237 early 2008 1,6 aka Oryginal. I have to change an uppercase cuz my laptop was drinking too much water ;-) The standard procedure after this accident was passed, Unfortunately some keys still didnt work, same as power button.

Do I really need dedicated upper case signed "Oryginal" or any uper case signed to model 1237 should be works out of box?

Many services didnt see any diffrence beetwen this ,but ifixit have two stocks, one to part signed oryginal and another one to parts without it.

Thanks for any response!