The PostgreSQL Server installer of EnterpriseDB adds to enterprise level tools to PostgreSQL, like replication. Besides that the Standard Server installer is more sophisticated than the Servoy installer. It will for example install the PostgreSQL database under it's own user.
As of PostgreSQL 11, EnterpriseDB doesn't provide Linux installers anymore. The PostgreSQL community maintains repositories for several Linux flavours:
Debian and Ubuntu: https://wiki.postgresql.org/wiki/Apt
Centos, RHEL, Fedora and Oracle Enterprise Linux: https://wiki.postgresql.org/wiki/YUM_Installation
NOTE: EnterpriseDB is a commercial party with its own (commercial) version of PostgreSQL, they also create and host the community (FOSS) installers of PostgreSQL. In this document we are always referring to the community installers.