Viper vs kaibab - Vortex Kaibab HD 20x56mm Binocular

clear day, 100 yards. 6.5-20 x 50 viper rifle scope on 20 power:.270 bullet holes on red-white target clear and sharp.
20 x 56 kaibab with same conditions and distance: bullet holes visible but not sharp and not clear.
kaibab has vortex top glasses compared to the viper's glasses. did all possible adjustments on kaibab, no improvement. at 50 yards kaibab is equal with viper. this is actual results at the shooting range. it is a disappointing results from $1000 more expensive binocular. will try to adjust more if possible and post results. fisherman.