ZTE has multiple product lines - last year at IFA we saw an Axon, a Nubia and a Blade and that was just the phones! This year, the Axon line is back with a mini offering. While the 5.5" Axon 7 is heating up in the US, a more compact (if not 'mini') 5.2" Axon 7 mini comes to provide an alternative.
Source: http://www.gsmarena.com/zte_at_ifa_2016-review-1483.php