From a guy point of view ..
if ego is in the consideration, i think .. if u are more capable then her .. then no issues.. we can be just pri school or dropouts .. but as long as u can provide for her .. then wats the issue .. ?
if she can earn more .. but u can provide for her in other ways .. like emotional side .. does having a high education makes us more sensitive.. ??
To sum it up .. as long as when it comes to feelings .. both of them feels it .. then other stuff should not be any issue.. be it age, height, background or even education.