- Aliens all have 5 tiers of weapons rather than 3, although all the tiers share one appearance. The Laser tier gets bonus aim, the Coil tier gets bonus pierce, and the Beam tier gets bonus Rupture just like other soldiers' weapons do in LWOTC.

- The Muton Trooper is the only alien that has 2 options for primary weapon type: the Muton Rifle or the Muton Cannon. The rifle does less damage and has a smaller magazine than the cannon, but it's more accurate when shooting up close and can be infiltrated into a mission faster. Additionally, most abilities that grant a bonus based on weapon choice grant a better bonus when picking the rifle. Their bayonet is a separate weapon and will function the same regardless of weapon choice (with the aforementioned exception of certain ability differences).

- The Muton Trooper can acquire a single upgraded version of their bayonet, called the Muton Elite Bayonet. It's gated behind the Muton Elite autopsy. In addition to improved stats, it also includes the Bayonet Charge ability, which lets the Muton Trooper make a melee attack with a dash move.

- The Archon can acquire a single upgraded version of their staff blade, called the Archon Titan Staff Blade. It's gated behind the Sectopod breakdown. In addition to improved stats, it also includes the Lightning Slash ability, which lets the Archon make a melee attack within blue move range without ending their turn.

- All aliens get 3 utility slots, just like human soldiers in LWOTC. However, they are limited in the items they can actually choose from, which leads me to my next point...

- Aliens have different equipment restrictions depending on their species. All of them are unable to carry and use medikits (all variants, including the Bio Medikit from the Bio Division mod), Skulljacks, Overdrive Serum and the Hacker Laptop from the System Infiltration mod. The only ones that are able to equip and use grenades are Andromedons and all Muton variants. Additionally, Berserkers cannot equip ammo.

- Berserkers don't get primary OR secondary weapons. They do still get 3 tiers of armor, though. Trust me, they don't need weapons or weapon upgrades; they are quite powerful enough as it is.