A small Comparison between LCA TEJAS and Pakistan's Chinese developed JF-17.

LCA TEJAS MK I
Image credit: http://i.imgur.com/

Image credits: Wikipedia commons    JF-17

JF 17 is a Chinese developed fighter based on a old soviet MIG design. Its an all metallic war plane with no fly by wire controls means the pilot will have more work load to fly the aircraft. 

Unlike Tejas  JF-17 is not all weather  capable and also not fully developed by Pakistan. Where as Tejas is fully developed in india although some vital parts like Engine are imported. 

When it comes to Radar detection JF-17 will have larger radar foot print where as Tejas will have less because of the carbon composites body structures!!

Tejas have modern glass cockpit and continuously evolving according to air-force needs. The FOC standard Tejas will have in-flight refuelling,BVRs,capability to carry stand-off missiles,all kind of conventional and smart bombs which IAF posses. 

The FOC standard Tejas will be a Multi Role all weather 4.5++ aircraft. But JF-17 doesn't have this kind of all round capabilities.