Is this an opinion? Because based on numbers alone, a Badlander with 9 rounds and auto-loading holster would allow a player to dish out far more DPS than an Ikelos. That's without even specifying which weapon you're switching to for 5 seconds while the shotgun reloads itself. Heck, even an 8-round Badlander could do this depending on your secondary weapon.
When numbers are involved, you should do the math before you assume.