Recent reviews by OTA.i17.SqL.0242

A bit pricey, but well worth it, I believe is a notable successor to Killing Floor, and surpasses Left 4 Dead by a long shot.
Any way, I compiled a list comparing L4D2, and Killing Floor 2.

Killing Floor
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+Class Customization
+Character Customization
+Fluent Character Animations
+No Objective
+Variety of Classes
-Weapons are found at a Vendor
+In Game Currency
-No Character Models at the Workshop
+Downloadable Maps
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Left 4 Dead 2
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+A Strong Storyline
+Plenty of Lore
+A Variety of Weapon Choices
+Ability to Murder Foolish AI Allies
-Team Kill
+Throwable Weapons
+Workshop allows for NPC, Character and Weapon Customization
-Unrealistic down events, ie, jumping off a rail=Dying
-Special Infected