Go for it blindly, i mostly use JDM cars and have lots of experience, i had many vitz in my experience, i kept 1.3 2006 model, 1.0 2002 model, 2015 1.0 model etc., aqua, belta etc. etc.
never go for faw, as you live in pakistan and resale matters...regarding parts, everything is available and at the same rate of suzuki, nothing costly, e.g. i bought front shock jenuin in 2000 rs, original side mirror of vitz was costing 5000 - 80000, while in my suzuki margalla, original side mirror was costing 5000 to 6000...so its not too much, same price of suzuki, corola etc.
best things about these cars is that you can sleep in it while ac on, on all day and night, it wont heat up, it wont eat up fueal....extraordinary performance, road grip , drive pleasure....you cant get it any where else...brother...