when both pilots have a lower skill - the gunship wins
when both pilots have average skills - its a 50 / 50
when both pilots are aces, the bomber wins
reasons for that:
lower skills - the weaponstats for velocity are very important and the sustained "spray and pray". a bomber vs. a small gunship at low skill will miss a lot of its high-damage shots, not cause the gunship is dodging, but cause its simply moving and a low skill pilot needs to get used to quick-weapon-changes to adjust their targetting.
average skills means that both are dodging - but the powers of the smaller and more agile ship grow un-proportionally to the skill increase. - a dodging bomber is harder to hit than a dodging gunboat while the damage both can do to each other is more or less similar.
an ace bomber will be able to snipe the gunship from a distance where the gunship cannot really respond. - the dodging of the bomber makes it almost invulnerable and it can utterly dictate the combat due to its much greater agility and speed.
edit:
keep in mind that this does NOT mean that an ace bomber is better than an ace gunship! - a gunship performs more tasks than simply killing bombers - it can also support in larger battles and do tasks bombers aren t really suited for. - a gunship is invulnerable to a light fighter for example, no matter of the LF skill. - a bomber is not.