hey guys. firstly, i dont know the difference in these 2 other than the price. the b70 is cheaper and i dont know why it is.

does anybody know the differences in these 2 bigsbys?

also, is installation easy? i've heard it is really easy. but if it is, then why are ppl in my country telling me installation costs 50-80SGD(35-55USD) when installed by a professional.