In his topic both devices are compared: http://forum.mikrotik.com/t/wifi-comparison-between-hap-ac2-and-hap-ac/118754/1
[quote=viprit post_id=718446 time=1551524526 user_id=139430]
Gimmie ‘the full cancer’ - how can I have one device penetrate through all the walls (or closest to it)?
[/quote]
You can’t. Half the problem is to make the AP signal to reach the clients - here You can get quite high power with relative easy. But the other half is the other way around: to make the client’s signal reach the AP.
And is quite hard to get a mobile, or simple wireless card on a notebook, with high power.