Why are the cannons so weak on the 109-E, yet so strong on the Russian planes?

[philabong2]

hey guys,
all this talk about RoF and fire power reminded me of this vid, I thought this was completly amazing and wanted to share lol - The company's called Metal Storm and are developping new guns which are quite impressive and very versatile - goal is to put maximum amount of effective rounds in the smallest volume and in the shortest time spand

http://www.youtube.com/watch?v=OlkpRjjHaog

There are a few more of these on youtube