No, in general 5G NR is an evolution of LTE, with improvements in many areas (such as latency and flexibility). Most are just too technical to make sense in marketing.

The changes were required for decreased latency, less time required on the network for power saving, bandwidth agility to support less capable power-conscious devices, and increased performance by making more efficient use of the available bandwidth. Many improvements were made to support higher frequencies of course, and the ability for the core network to effectively load-balance is essential for supporting the throughput requirements of the higher bandwidths.