It has been a little while since Star Trek Attack Wing has come out. And a while since the inevitable comparisons between it an x-wing. I think many of the original comparisons were knee-jerk reactions. We didn't really know Attack Wing well enough to make an accurate comparison.
Models:
The first thing you notice is the difference in the models. X-wing models are amazing and Star Trek Models are fair. Part of this comes from less attention to detail on the part of Wizkids, but part of it comes from the fact that (IMO) Star Trek ships don't look as cool (at least at the detail level) as Star Wars Ships.
That being said, the bases and posts in Attack Wing are superior. A notch instead of little nubs that stick out is just a better design and the posts in Attack Wing don't break nearly as often
License and Factions:
A big part of this for me is simply the fact that I like Star Wars more than I like Star Trek (I like both, but I have a favorite)
Attack Wing has tons of more factions four main ones now and lots more to come. But I don't feel like these factions are as well thought out. With the last release I had to ask myself do the Romulans really need another tiny cloaked support ship. But that leads to the other issue with the factions in Attack Wing. You can mix and match pretty much all you want. You don't even take penalties for having ships from different factions in your fleet. I have always played faction pure fleets, but this isn't even really the way the game was designed to play. In Attack Wing's defense, Star Trek is one property that justifies mixing up your factions more than just about any property I could think of. But I feel like the net effect of the way factions work is you get two kinds of fleets, faction pure fleets, and super fleets where all the various special rules are combined in tournament winning combinations.
In the end I prefer the Star Wars, Factions system better
Rules Differences:
It is pretty obvious that of the two games Attack Wing was made second and they learned a few things from X-wing. Things like disabling torpedoes instead of discarding them. Not that I think the disable mechanic works well for Star Wars ordnance as well as it does in the Star Trek world. But the disable mechanic allows for a lot more interesting possible upgrades.
The biggest change is the way Attack Wing handles pilots/captains. Instead of combing them on the same card Attack Wing has you buy your captain and you ship separate. They don't have mid range PS un-named captain like they do with the different squadrons in X-wing. I really like this innovation In Attack Wing.
More to come....