These aren't really differences. Just keeping up with the times. Even down to resistances and disciplines which are going to be pretty much the same. There are differences like a new crafting system and temporary campaigns etc that are all designed to reduce player attrition that shadowbane sorely needed.
My point is that every time something is introduced that was in shadowbane, like guards for instance, someone who played shadowbane talks about how they worked in shadowbane and will likely work here. And instantly everyone says "this isn't Shadowbane omg omg omg".