Thought I'd post this here since PS3 forum needs the boost. I've paraphrased some of the module descriptions. Hope it makes sense.

Auto armor: automatically engage armor mode when taking damage/ No upgrade

Weapon pro: faster reload/faster ADS/ faster weapon switching

Prox. Alarm: warning when enemy near/increased warning frequency/maximum warning frequency

Phantom: faster transition to cloak/no sound entering cloak/reduced cloak shutdown when firing from cloak

Scout: Enemy direction on radar/single radar sweep on spawn/enemy health bars shown

Heavy Weapon. Pro: Move faster with heavy weapons/faster heavy weapon rip off/increased ammo in heavy weapons

Point Fire Enhance: 15% hip fire spread reduction/20%/25%

Hunter: no foot step sounds/see uncloaked enemy footsteps on ground/footstep direction and increased footstep trail

Armor transfer: kill gives back 15% armor/20%/30%

Rapid fire: 15% increase in fire rate/20%/25%

Low profile: protect against max radar/no heat signature in nanovision/immune to ceph gun ship

Ordnance alert: REX charges glow red/alerted when in enemy sight/enemy bullet trails visible

Manoeuvrability: increase movement speed/increase ledge grab and vault speed/no fall damage

Aim Enhance: 10% reduction in recoil while ADS/20%/30%

Surveillance: highlight enemies while ADS/auto tag enemies while ADS/enemies can’t tag you

Retriever: Auto collect dog tags/support bonus requires 1 less dog tag/increase support bonus duration

Detonation delay: delay grenade and rex detonation/you are less affected by flash bangs/auto defence against rockets

Expanded arsenal: have 2 primary weapons/additional ammo for both weapons/additional grenade or explosive

XP bonus: 5% increase in XP earned/10%/15%