Not really, unless you're looking for focal length which is closer to hypothetically "perfect" 43 mm, or looking for a slightly more compact package.
My friend did the jump and there is no noticeable difference in image quality when printed on regular size paper (8x10"). Not sure what happens when going bigger though.
They are both outstanding lenses.
I have shot both but cannot recommend one over the other.
If you already have one you may not find any advantage in the other.
T