802.11g Speed - How Fast Is 802.11g Wi-Fi Networking? WiFi has a maximum of 54Mbps and according to 4G LTE Advanced Tutorial :: Radio-Electronics.Com 4G LTE has a maximum of 100Mbps. As others have said, YMMV, and will probably be far less. For example, I downloaded Dungeon Hunter II on WiFi and Dungeon Hunter III on 4G. The files were about the 485mb and took about the same time.
My parents have no internet, but they do have excellent 4G. When we've gone over to visit, I've hooked the Bionic to their HDTV and watched a Netflix movie with no problems.
I have no WiFi at home and go to the Public Library if I need it (I've found that a lot of places with "free" WiFi are unable to much more than look at email). I have 4G at home so it's on all the time. If I had WiFi at home I'd probably use it as it doesn't hit my data plan.