No new games, catching up with the world, and filling it with the name of SpazDragon, the dragon with a spas-12.
I'm mostly neutral between both universes, and hopefully not putting anything at risk by doing this.
Compared, both sides of troops are have their advantages and disadvantages. I'll start by comparing Spartans to different sets of troops.
I think the Spartans are closer in comparison to Republic Commandos, even though the Commandos lack augmentations that increase attributes(consider S.P.E.C.I.A.L.). In tactics, or weapon carrying, Spartans can only carry two weapons at the same time, while Commandos have a single weapons that can change whenever needed, along with a blade ejecting gauntlet. Both have energy shielding. Both have similar ranks, and each troop within a squad have advantages(i.e. Demolition, Speed, Sniping, etc.).
In a typical sense, Marines are similar to the way Clones are: Both are limited(One's population while the other is Cloning). They are the general ground troop, and carry basic weapons. Both are effective but not professional unless proven. Ranks are the same.
Some other species are probably closest to other Species in Halo:
Sangehili-Trandoshan
Yanme-Geonosian
Unggoy-(I'm not sure)
Jirilhanae-Wookie
San'Shyuum-Yoda's Species or Quermian
Kig-Yar-Fosh
Hurogok-No freaking idea.
Forerunner-Raakata
As you can probably tell, I'm a nerd of both things. Both universes are similar, yet Halo's is smartly simple, and star Wars, is mostly random(It was hard to pick a similar species.)
So, yeah.