How to upgrade from ESXi 5.5 Enterprise hosts to 6.5

Hi There,

We are planning to upgrade our ESXi hosts (15) currently running on vSphere 5.5 with Enterprise license to vSphere 6.5 update1.

As we are aware, Enterprise license model is discontinued and Standard, Enterprise Plus and Enterprise Plus with vSOM are available in 6.x, and, existing active SnS Enterprise licenses are supported till 2020.

We do not want to move to to Enterprise Plus license model at this time, so, Is it possible to upgrade 5.5 Enterprise license to its equivalent license type in 6.5?

Thanks

Mahe