Can't say on the wagtail but the ninja's are very good for hand and pole work.. Infact using the outer channel when doing pole work is awesome as it don't matter what angle your taking the water off from.. Most handles when pole you have to be in the correct position or water passes by the rubbers sharp edge most common in the last quarter of the glass but not the ninja. I think if your doing shops and large glass windows the wagtail maybe better thou...