Star Warsverse vs. FreeSpaceverse
OK, I have to admit that FreeSpace is a relatively old, forgotten 1990's game whose lost souls are hard to dig - but I remain loyal to it.
FS is one of the best Sci-Fic flight sims I ever played (scific flight sims have died no wonder 😠 ). I know that in-game the ships are much more noobish (120 m/sec even with afterburners) but if you see the cutscenes you'll see a worthier counterpart.
So now, I'm willing to pit a battle between FS and SW. It's Rebels vs. GTVA, and Shivans vs. Imperials in a massive battle between two galaxies.