Since Costco online had both of them, I went ahead and bought the Max version thinking that if it didn't have enough suction I could always return it and get the CG model. It arrived and I'm happy to say it sucks. So it won't be getting returned. I also picked up the sand and silt bag off of ebay for it.
The one thing I love about this little guy is that I can turn the pump off and vacuum allowing me to see the bottom clearly. Thanks to everyone that replied.
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