Main Differences Between 3G and LTE 3G can run up to 7.2 Mbps , which is very good at that time. On the other hand, LTE can run up to 100 Mbps, which is less speed than 4G. 3G can be slow at the time of download. On the other hand, LTE is much faster, and we can also tell that LTE is faster than 3G.