Let's make it more exciting. How about wager on when:
(1) first prototype to fly --- LCA or Chinese stealth???
(2) first to be inducted --- LCA or Chinese stealth???
When I say LCA, I mean 100% indigenously produced (i.e. incl Kaveri engine).
The J-10 project was declared complete in 2004 after 18 years of development. It flew with a foreign engine and radar but was classified complete.
The J-10 A latter developed was fully Indigenous
The LCA project started in 1990 flew its first prototype on 4 January 2001
And after 19 years in development. The first production version of the LCA flew this year. after 19 years of development. Using a Foreign engine.
The Kaveri engine now also been deemed functional and operational but fails to generate enough trust to be used on the LCA.
So whats left, is upgrading both projects to work together.
That is one of the goals of the LCA MK2
With regards to the stealth fighter. Now lets just assume that China is even close to completing it.
Which is really unlikely.
And they do get the plane to fly and work perfectly
CHina will never tell the public anything about it till 10 years later.
So the Comparison you have suggested is completely unfeasible. even if China is actually on teh verge of getting the J-xx
Unless you want to meet back here 10 years later to when we can do this
Seriously though , China wont say a word about that plane if it is completed even today. so there is no point tying to compare anything with the J-xx until China actually releases some details.
so i am sorry but your comparison isn't viable