look .... you very well know that IAF report are confidential ..but it is well known that fact that a few of them didn't meet the criteria. Lets compare jf-17 with Gripen ng both are single engined craft as LCA is not operational yet. and here we are comparing multi role aircraft not the customized one. The thing i was concentrating on is payload.
Ok then.. (just in case I still am not sure what you mean by "customized")
Btw..the Gripen NG has not yet been built.. its was the Gripen C that filled in for its planned upgrade in the MMRCA trials.
The gripen C has a max loaded weight of 14000 kg pushed along by 80.5Kn(in afterburner) engine.
The JF-17 has a max loaded weight of around 12500 kg pushed along by 84Kn(afterburning) engine
The gripen C(tested at ladakh) has a normal takeoff run of around 600m fully loaded at near sea level conditions. Lets assume that at altitude it becomes 800m.
The JF-17's data according to the official website is 600m fully loaded near sea level conditions. How bad could it get at altitude?
800m?
The JF-17's took around 1/4th of the farnborough runway to take off with 3 fuel tanks.. 1/4 of 2500m(approx length of both runways at fanrborouogh by official data
World Aero Data: FARNBOROUGH Runway 06/24) at sea level. So its logical that the data on the website is mostly accurate on takeoff dist.
So the JF-17 having similar parameters as the Gripen C .. HAS managed similar performance at sea level.
Whilst being able to fly further.
Since no data exists at altitude, Ill have to rely on knowing that tests of the JF-17 have taken place at Skardu at 7316ft and have been better than expected.
Since you cannot verify the gripen performance either other than claimed by Indian members here that it too was better than the other at Leh at 10000ft.
Now coming to payload.
The Gripen C carries max fuel internally 2270kg..add this to its empty weight of around 6800 kg.. it leaves 5000kg of payload capacity remaining from its max takeoff weight of 14000kg.
The JF-17 carries 2300 kg of fuel internally as well, add this to its empty weight of around 6600kg..it leaves around 4000kg of payload capacity remaining from its max takeoff weight of 13000kg.
The Gripen has the T/W ratio close to 1:1... which the JF-17 also matches.
So .. in conclusion.
The Jf-17 manages a similar takeoff roll to the Gripen C carrying around 1100 kg less but is able to fly 1880nm to the Gripens 1750nm. Draw the rest of your conclusions yourself as any other detailed data for the Jf-17 is not stated in internet links.
And oh... the Gripen C costs around $69 million.
http://www.defense-aerospace.com/dae/articles/communiques/FighterCostFinalJuly06.pdf
The JF-17 costs around $15 million.