I don't think open air seats are good when you've got a low atmospheric pressure, either. It looks like the prototype is a mock-down at a lower scale. The principal advantage of hyperloop is that it takes the atmosphere (which is a liability for maglevs) and turns it into an asset,- by collecting it at the front and redirecting it below as a mode of levitation. This means the tracks can be unpowered. I'm not sure if the tracks are powered in the chinese maglev, but the article said "superconducting" so that's energetically costly either on the pod or on the tracks.
An interesting maglev alternative to superconduction is inductrack, which, however, cannot be combined with magnetic propulsion - https://en.wikipedia.org/wiki/Inductrack
The atmosphere isn't a liability for Maglevs, you could make hyperloop with maglev tech and it'd still work fine.
The tracks don't need to be powered for most Maglev concepts; superconducting maglev doesn't use powered track. Superconducting maglev is also energetically extremely cheap from an operating perspective - it's arguably energetically expensive during construction because you need a shitload of permanent magnet material (the entire track surface is coated with it). The superconductors are the cheap part from a system perspective.
Electromagnetic suspension - like with shanghai maglev - also doesn't need a powered track, the relatively small amount of power required can be supplied by onboard batteries and periodically refreshed.
Inductrack can be combined with magnetic propulsion, it's just not a form of magnetic propulsion in itself. There's no obstacle to integrating a separate propulsion stage into the track (as is proposed in the inductrack based container movement system proposed for... LA?)
Atmospheric drag absolutely is a liability... That's the whole point of an evacuated maglev.. To make an artificial atmosphere with lower drag. Note how the mockdown chassis cross section is small relative to the tube... That's also a drag limitation; and note how hyper loop has a nearly full tube cross section.
Sorry, I didn't word that very clearly - yes it's a liability, but it's a liability that's fairly independent of the levitation mechanism. I think it's more clear to say "That's the whole point of evacuated tube transport, to make an artificial...". Whether you use wheels or maglev or air bearings is a separate issue.
Hyperloop doesn't turn the atmospheric drag into an asset - it just uses a particular method of overcoming the large liability.
Because of how it overcomes it, it might be able to get away with a higher blockage ratio, but to say that with any real confidence you need to specify the vacuum level in the high-vac example you're comparing it to. And then do a bunch of compressible flow math that I've not yet seen for a high-vac ETT. This paper (http://jmt.swjtu.edu.cn/EN/abstract/abstract8587.shtml) looks at the incompressible flow case... but that's kind of missing the point I think.
The story also says "Zigang has a tube that lowers air pressure in the running environment to 10 times less than normal." (This probably makes little sense to someone who's good at physics of gases--reducing by 100% or 1x is the lowest you can go with that.)
In general, I guess this story has about the level of quality that one should expect of a science & engineering story sourced from the _Daily Mail_.
An interesting maglev alternative to superconduction is inductrack, which, however, cannot be combined with magnetic propulsion - https://en.wikipedia.org/wiki/Inductrack