The Javelin and Vixen were designed to the same specification, but ended up being very different aircraft, both unique and interesting in their own way. Suppose for some incredibly obscure reason the RN and RAF went to war with each other; in a one on one dogfight which fighter would win, Javelin or Sea Vixen?
@TheFantasticTyphoon I agree
Personally I would pick the Javelin. Unlike the Sea Vixen it had guns, which are more reliable than missiles in close-quarters combat.