TO be fair, that ASM is a much larger skimmer than the ER we're talking about, and I dont think the ER would be able to keep up.
The problem is, the ERs are much nicer now than the ASMs, and the prices aren't that different. ASM hasnt changed their product, and has significantly increased their prices, whereas ER has mde their product much better, and decreased their prices. I dont think anyone should be buying an ASM right now.
That being said, all commercial skimmers are generally well below their potential, so if you're willign to do a tiny bit of work, I'd reccomend going with the cheapest one you can find with a good, big body. Its so easy to get pumps to pull significantly more air, that I dont think its worth spending the $200+ that ER wants for their pumps, or the $100 they want for their impellars.
Thats why I'd suggest a Reef Octopus NW150, and then put a meshwheel impellar on it. It'll be much cheaper than the other two options, and outskim both of them by a wide margin. Its also cast acrylic, which neither of the other options can claim.