Those are two separate technology standards. 3GPP2 evolution got merged and we came down to a single "4G" standard with the LTE air interface. It borrowed a lot

Those are two separate technology standards. 3GPP2 evolution got merged and we came down to a single "4G" standard with the LTE air interface. It borrowed a lot from WiFi's adoption of OFDMA that allowed a lot of the bandwidth increases. 5G evolution on the air interface though significant, are just an extension of that, using higher frequency bands. But where the meat of 5G lies is in expanding on the legwork done in LTE specs in preparation for IoT. It brings in the ability for multi-bandwidth, multi-reliability and multi-latency applications and SDN paradigms. "Kubernetes for the Network" kind of terms are being thrown about. Initial deployments though will focus on "FTTH replacement" scenarios.