Richy..the 901 will foam better...reason being the Marine is made not to suds up much for use on the water...but its a better cleaner...you do not want a soap that suds like crazy if you washing your boat while in the water...lol...the greenpeace people will come...
901 foams real nice...you can add a oz of the marine soap to the 901 for a bit extra cleaning also...the 901 will still foam up..
Al
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