what speed do you get on vertminer comparing to cgminer

for 7970 i have 257kh/s, using config someone posted already here: -s 1 -E 15 -Q 1 -v 1 -w 256 -g 2 -I 13 --thread-concurrency 8192 --shaders 2048
any ideas ?
where can i find this config you are talking about?
Got 7970 aswell but no clue how to conf it
