The research on this is conflicting.
Very different and much better from the younger girls I dated before meeting her.
In our case, we each grappled extensively with the age difference in our own way in the beginning, but realised after a couple of years that what we really wanted was to be together.
The women who gave their accounts on age difference and dating ranged from being the older spouse to much younger.
I guess some people are only meant to be in your life for a certain amount of time.
We started dating at 19 and 34.