That is not my experience.
There are primary mfg lines for new build. These line are staffed by the "A team", have the most efficient and complete test equipment, and each unit is tested. Refurbs likely have their own mfg line/site. Their volume is much lower and more diverse between products, and their operators are more Jack-of-all-trades than specialized, (because they have to handle any product and some weird issues). Expected reliability drives the significant difference in warranties between refurb and new. (Warranty is the company betting there won't be a problem... and you can see they make a much larger/longer bet on new builds.)
Given the choice, I would buy "new" every time. How much will a couple hundred $ savings be worth AFTER you have everything set up, connected, dialed in, then have to unplug everything and send it back for repair... whether covered or not? Just my .02