One difference between LR and [R] is the way [R] interprets and respects Vanilla lore, thus changing our stance and attitude toward certain factions like the Outcasts. As I've said before in this thread (I think?) one of the reasons we created [R] was because of the LR-'s history, which ultimately would have interfered with how we approach Allies and Hostiles alike.
Apart from that I suppose there are differences in how both factions Roleplay, as you for example chose to stick to the "old" Liberty Rogue speech that has been established by some very smart person at some point in the Discovery Timeline while we tend to use "normal" speech, with slight variation here and there of course.
Last words are for fools who have not yet said enough.