Its a wasted comparison.. everybody knows JF-17 is miles ahead than LCA..
Lets compare specs.
Engine:
LCA- some crappy stuff from GE, which is not a good company and that GE414 which powers F-18s and next gen grippens are known to be faulty.
JF-17 - now RD-93 , the only notable product that Russia makes, (even though the same engine is made in India, its still made in India , hence could be faulty).
Later the latest chinese engine WS -10 with the best of technology, the decade can offer will power J.F-17s
Also in specs the LCA has more power and thrust, but its of no use .. acceleration, milaege etc are in JF's favor. We all know russian engines are less maintenance than GE
Airframe
LCA- rumoured to have composites but its not an advantage. It also has delta design of j-10s, EFT,Gripens, rafales which is old technology.
JF-17 - full composite ( data u have in net is wrong as PAF keeps lots of stuff secret)
Radar
LCA- some Isreali stuff ( we all know that Isreali technology fails ,even rockets were successful against their Iron dome)
JF-17- Chinese - ek dum first class, proven , ahead of a generation stuff.
Avionics
LCA- Isreali, Indian, french and what not ( everybody knows too many cooks spoils the broth) hence a BIG fail.
JF-17s- Chinese.. single vendor, world class, lots of african nations and few middle east AF's die for it in their jets.
HMD
LCA- some Isreali ELBIT dash which is inferior to chinese as its Isreali.
JF-17 - Chinese HMD which can be compared to EFT or Raptor in coming batches and will be present in J-20, J-31, J-32 etc.
Targeting pod
LCA- lightning targeting pod from Rafael which is inferior to most systems available.
JF-17 - Chinese- KG300G hailed as the next generation in technology.
Weapons <--- my favorite part.
LCA- some Russian, some french, some Isreali, some Indian ( come on what is that a United nations weapons package)?? we all know too many cooks spoil the broth ... hence failure...
Even mighty Meteor a2a is supposed to arm LCA... we know its not operational and will be obsolete in front of chinese tech.
JF-17 --Chinese- PL 1,2,3,4,5..(best in the class), even has Pirahna ( not the fish_) and the best missile ever AIM.. do i need to say more.
So we can see the clear winner is
JF-17 .