Glass is better unless you consider that it is breakable. Many plastic tanks will crack up from certain citrus juices and cinnamon. Glass will not. although I think they have improved many plastics to hold up better to the "tank cracker" juices, but how to tell which ones hold up and which ones do not. I am not the best to ask on which of those two tanks. Both get good reviews. Watch some reviews on youtube and see which one you might like the best. Maybe price replacement coils since that will be an ongoing cost factor.