You need to pretty much ignore all the figures for hashing except the Avg one. With kanos update it is infact more accurate, hence why you see fluctuations in the hashrate. The pool side evens out over time and will never read exactly what you've got.
If you want a decent comparison between the two versions make a note of the Hardware Error percentage on the standard version and kanos version. There's no point having more speed of the errors are higher