Rant are all dampers created equal?

No.. they are a different size for a reason. each pass creates a slight vacuum that replenishes your inks
when the head stops firing. dual channel heads can use small dampers but it is recommended to use large.
If you are throwing solid colors, big dampers are better

 

If you tell us about the model of printer you have. Perhaps we can help you better. No, not all dampers are created equal. Mimaki JV3 uses short dampers. Mutoh dual channel damper is for DX7 printhead technology. Guess someone is confused here.