Limitations of CDP trial

[#1]

Good afternoon,

I'm about to deploy CDP 7.1.8 and CP 7.7.1 but seems the licensing is going to take some time, my question is:

is the Trial version same as licensed one? can I install Trial version and then update the cluster with the license?

Question key: 

I'm about to build an HA environment, that means to deploy external Postgresql database, can I install Trial but to avoid using the embedded one?

Many thanks in advance.