Strengths of xiaomi mi tv stick:
built-in chromecast;
android tv for a reduced price;
command for navigation with dedicated buttons from netflix, amazon prime video and google assistant;
access to google play store and possibility to install external applications;
portability.
Weaknesses of the xiaomi mi tv stick:
does not stream content at 4k;
it only has a 1 gb of ram;
it only has 8 gb of storage (5.2 gb available)
box is missing an hdmi extension