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I would guess that commercial tiles are thicker, and therefore more durable. But it probably depends on the manufacturer.

Following is more info on vinyl flooring:

http://www.building-your-green-home.com/vinyl-floo...

Natural linoleum is quite popular for commercial use - especially in hospitals and schools.....it comes in tile as well as sheet flooring, and is comfortable and nontoxic. See this page:

http://www.building-your-green-home.com/linoleum-f...

Hope this is helpful.