they both have their pros and cons.
personally i like BING better , out of the last 4 times i went on the road with my G-f ( she uses a Android phone ) we always ended up throwing her phone in the back seat and switching to BING on my WP . lol.
as for traffic , i live in Montreal, Canada i have traffic on my phone... and it works better then Google traffic cause it has more LEVELS of traffics...
Google ahs 3 , Bing has 4. BING gaves me a green, yellow , red, and black ... Google just give you green , yellow and red.
so bing actually ahs a better specification when it it comes to traffic. ( Google gives me a red line so I think its bad…. I look on bing its black so I know its HORRIBLE!! Lol ( I use it every night omw home from work , that way I know to take side streets )
as for street view , i find it more annoying then anything cause it always takes 5min to load. lol .