Difference between OpManager and OpManager Plus

Hi All,

I am new to Manage Engine suit of products. what is the real difference between OpManager and OpManager Plus. I have gone through the link https://www.manageengine.com/network-performance-management.html?MEtab. But not getting exact clarity.

We have a requirement to manage Network devices, servers and Application and transaction monitoring, response times, etc,...

It would be great if somene can give clarity on this. So that we use the correct product for implementation.

Thanks in advance.

Best Regards
Bharath