If their origin is good, then it's worth it, but now there are a lot of good options available in Pakistan within almost same budget, e.g Honor 4C, P8 Lite etc.
Specs on paper maybe better for Z10, but the real life user experience is a lot better on these Huawei phones than Z10.
The software runs the hardware, and Qmobile software is not very optimised.
Some of Qmobiles are very good, but most of them are highly unpredictable. Some come with manufacturing faults that is not covered in warranty, some get faulty after a month of usage, some work good for years.
Search for "______ is a rebranded version of" and other similar terms and you will know it for most of their phones. Even they mention it in reviews too.
Or you can also use their thickness as a key term for finding their origins.
Like if Qmobile phone is 5.1mm thick, so search "5.1mm thick phones" and there you can lookup easily.