Okay, i pulled the trigger and ordered a blue one with 52-36T for 85€ 
Will give you an update as soon as it's here.
Okay they arrived two days ago. But I'm a bit sad, because the colour is like cyan and not blue :'(
Will most likely return them or sell them if somebody is interested.
See few pictures here:
https://photos.app.goo.gl/J9Wh4xRSFHDnFhkH8Did not ride them at all, just turned the crank few times, noise level was nearly the same as with the RIRO one. But it's also a KMC x11sl chain.
Overall the machining and all looks good, but the colour is way off for me and my bike.
And of course it's not possible to check if that's real 7075 with T6 heat treatment or not.
Could be lower grade aluminium or even the anodizing can be just for the colour and not really add resistance to the chainring.