Those are the new version of powerline that try to run 2 overlapping signal using mimo like wireless does. I have seen very little testing results on the technology. I suspect like wireless even though in theory it double the speed you likely only get 10-20% more.
Don't even consider wireless if you can not get 802.11ac to work. 802.11n caps out in most tests on the very best routers well under 100m. To get more speed you must be able to get very strong signal on the 5g band using 802.11ac. To get it to work you must be able to get a block of 4 of the 9 usable 5g channels that your neighbors are not using which is highly unlikely.
powerline devices when they work tend to be much more stable than any form of wireless because they are less susceptible to random interference from neighbors.