-JF-17 Thunder and JAS-39C both fighters are belong to 4th gen family and light weight/single engine aircrafts.JF-17 Thunder is powered by Russian made RD-93 (Mig-29's engine) and it's engine thrust is 98kN while JAS-39C Gripen is powered by RM12 (developed from F-404 Engine) and it's engine thrust is 80.5kN but Thunder has much better engine thrust than Gripen.both fighters could give the tough time to each other in CAC (Close Air Combat) due to their advanced aerodynamics.
-JF-17 Thunder has total 7 weapon stations while JAS-39C Gripen has total 8 weapons stations and both fighters have wingtips on which they can carry short/medium range air to air missiles.
-JF-17 Thunder and JAS-39C Gripen give the modern platform to the weapons and both fighters are multirole aircrafts.
-Price tag of JF-17 Thunder is only $15-20 million while JAS-39C has $50+ miilion of price tag.
-No doubt JAS-39C uses modern technology than JF-17 Thunder because it's many components are U.S supplied while JF-17 Thunder has Chinese and Pakistani components but upgraded variant of JF 17 Block-2 will easily compete JAS-39C Gripen.