A way to check difficulty

[Silverman]

You can view the end-difficulty, so the single rate 50% to 200%, by saving the game, and afterwards dying. I'd recommend flying into a dominator-system without any weapon, droid and shield generator.
Now you can check the difficulty in the results screen. Obviously you should load the game again afterwards, that's also why you should save
If you mean the detailed list, I have to pass, though. Don't know a method.
Greetings
Silverman