I am looking for a versatile muti effects pedal that can give me alot of different sounds. I currently own a Zoom 505 II pedal, and I wonder if the 606 model is worth spending RMB 500 (thats about 70 bucks Canadian) more to go back to the store and exchange it. Please don't tell me to look into other pedals because these two are in my price range. So again I'm looking for some major differences between those two pedals in terms of tone and more options etc.