Well, that three inches can be a pain, literally, if you stand up too quickly.
That said, you will spend most of the time on
deck, where
headroom is not an issue.
Connemara has six foot of headroom ... in the
companionway; any further forward and I have to start ducking. But most of the time, I don't notice it.
OTOH, you're a foot taller than your wife. In a
boat with more headroom, she might find it difficult safely to move around below in a seaway because the handholds might be too high.
It's an issue that my Admiral and I struggle with as we look at new boats - we want a boat that suits her size and mine.
Like everything on a boat, it's a compromise.
Connemara