I agree with Beaviz. The 9410 is a needlewheel skimmer, the bubbles are smaller and their are more of them so it is definitely a bit stronger. But, if you have no issues with your current set up, no algae problems, etc. I wouldn't feel compelled to upgrade. The 9410 does not replace the 9010, it is just a new additional offering to complete the Master DOC range.