There's essentially no comparison to 4G, which can be found in virtually every city and town in the US. 5G is expected to have significantly more bandwidth, or capacity, than 4G as well.
Because of this, 4G is ideally suited for services which demand more capacity like video streaming, mapping and social networking sites. 5G is the fifth generation of mobile network technology.
It's a new radio technology, but you might not notice vastly higher speeds at first because 5G is likely to be used by network operators initially as a way to boost capacity on existing 4G core ...