Which is better? I searched a lot ,no clear cut answer.i currently use SimonK ,flies great,should I try BlHeli? Why they are costlier?

They are much more accessible
Much more features for programming whereas simon k has limited features and is beginner friendly
Well it's up to you to choose

SimonK is like NAZA less options you just have to do throttle calibration and its more than good to go

With BL-Heli its like APM you have lot of options to set or tune as per your requirement.

Not that the stock settings for BLHELI would not work, it would but it throws a lot of options to you to tune..

I prefer SimonK easy job, calibrate the throttle and vrooomm...

Thanks all for responding,I will stick with SimonK-then