100% faster would be 200khash

But I guess his kernal will do around 125 on the same clock you use. +25%
seems like you miss read my answer.
i have 200 kh\s on both card with your miner. It means that my hashrate is 401-403 kh'\s.
GPU #1: GeForce GTX 750 Ti, 201 (T= 50C F= 34% C=1407/2750)