eh. not much that you'll be able to tell in a honda.
the quality is probably a bit better. better metals, and much better welds.
dont, for the love of god, allow somebody to cut the cat flanges off and weld in pipe. if you are going to do a straight pipe then get one thats a bolt in replacement of the cat. that way, when you get busted you can easily put it back before you get charged with a felony.