Local YUM Repository for RHEL versions

Hello,

I need to know regarding setting up of Local repositories so that I can update or install packages on other RHEL servers.

In our environment we have many servers with different RHEL versions.

Like RHEL 7.2, RHEL 7.3, RHEL 7.4, RHEL 7.5
Arch = x86_64

I have setup one Repo server;

Installed RHEL 7.2 on it
Registered via subsscription-manager
Created REPOSITORY (creatrepo) with folder name RHEL7.2
Copied RHEL 7.2 dvd contents in it
Using http to install updates in another server with same version of 7.2 from this repo server. And it is working ok.

My question is;

For installing/updating packages on other servers with different versions like RHEL 7.3, 7.4, 7.5;

Do I need to create a separate REPO server for each version
e.g.
One RHEL 7.3 repo server for all RHEL 7.3 clients
One RHEL 7.4 repo server for all RHEL 7.4 clients
One RHEL 7.5 repo server for all RHEL 7.5 clients

OR

I can simply create another folder repository in the RHEL 7.2 server that I am already using as repo server and use this for other version clients
e.g.
1 RHEL 7.2 server having below repo folders for each version;
/var/www/html/rhel7/rhel7.2
/var/www/html/rhel7/rhel7.3
/var/www/html/rhel7/rhel7.4
/var/www/html/rhel7/rhel7.5

Thanks