I've had the Sanyo I mentioned, plus a little Sharp (model number not recalled) that was similar. They were nice, well-made, smaller machines that were made for smaller-scale cleaning. Like apartments in Japan, f'rinstance. The Sanyo I used as a very portable shop vac. The dirt filter was somewhat elaborate and expensive to replace.
I've worked on a couple of Hoover Duros machines; they were both marked "Made in China" on the bottom. One was dated 2006, the other 2005, so made before the Matsushita majority acquisition of Sanyo 12-09. The Duros, while made by Sanyo in China, doesn't in my own opinion compare with the earlier Sanyo products made in Japan. Of course, the Duros has added trim decoration on it for appeal in the US market, like cladding on the wands, etc. Or maybe the cladding is to reinforce cheaply-made plastic, I don't know for sure. I've criticized Chinese-formula (if in fact they use a formula) plastic for some time. For example, the plastic on the older Sanyo was pretty high-impact stuff, very durable. The plastic on the Duros is not good. You can break the mouth of the hose nozzle by dropping it on a hard floor, a fairly likely scenario for a vacuum cleaner component.
Other problems with the Duros include the spiral electric hose body pulling free from the attaching hub on the canister end of the hose; bag flange holder breaks; most common of all, clip latch failure in wand sections and at power nozzle (the same part is used in three locations on this machine). It's all pretty simple stuff yet causes people to throw machines away (and buy a new one). Chinese engineers should know, for example, that a canister vac is towed around by its hose and that these connections should be made well to last.
I'm not sure why Hoover specified a different bag for the Duros. The SR bags aren't the easiest to find. You can modify a Hoover S bag to work by cutting off a bit of the bag flange.