Depends on the creature. All creatures have a baseline save and that save is modified up or down depending on what it is. But they are all close to each other, there is nothing like PF1 where a creature could have +20 fort and +3 reflex.
LuniasM crunched the current playtest bestiary, you can find his work HERE.
It looks like saves are more balanced this time around, but FORT is a bit higher than the others, followed by REF, followed by WILL (for all but the highest levels).