I guess, for a start, the Lancer GT rims is 11kg where as the inspira stock rims is 9.8kg..the anti roll bar is only around less than 10kg for lancer 20mm..the bodykits of inspira and lancer GT is not that much of difference at all, so I would say a difference between 5-10kg? That is the only thing that I could think of.

For your info bro, Lancer GL chasis is different from inspira..inspira chasis code is CY4A same as lancer GT. Lancer GL's chasis code is CP9A which has the same chasis code as evo 6. Oh ya, my cousin owns a lancer GT and based on the lancer's forum..it is confirm that inspira is lancer GT but with a proton badge on it.