Fair enough an assumption. There's lots of airfoils that share a lot of similar looks.

However as Michel Selig showed in his various wind tunnel reports even small variations can totally alter how any given shape performs.

Fourtunetly or unfortunetly, depending on your viewpoint, this is only a real issue in unpowered model performance. Having a big fan on the front can make up for a wide host of "errors".

But equally when you start jumping between widely different shapes then changes are easily apparent even on the powered models.