Ace, my "guess" on why so many like the exports are because of a few reasons...
1. Extra channels
2. Echo
3. Roger beep
4. Power
Most of these are not available on FCC certified CB's. I believe some Galaxy certified CB's have roger beep built in.
Sure you can "add" any of the above to any CB. In some cases, some prefer the radio already had them in.
In the situation of having to add said options, if you do not know how to install or can't do it due to being OTR, then you have to hire a tech to do the work.
And that opens a new issue...finding a tech that knows what he's doing. Not the one with a golden screwdriver, a pair of diagonal cutters, some electrical tape and CB tricks open on his browser, as his only tools.
Now...yes many of the newer exports are not well built. The Ranger line of radios (Connex, Galaxy, RCI) come to mind. The older ones I believe were ok. The newer ones have solder joint issues.