Differences between the "Starter Accounts"

Hi there..

I read up on the variable accounts for deploying an SAP Cloud App.

In the SAP Store I found the two "small" possibilities, but I didn't find a difference: The count and spezification of the VM unit are the same, but for the price is different...!?

There is a "SAP NetWeaver Cloud Starter Package" (https://store.sap.com/sap/cp/ui/resources/store/html/SolutionDetails.html?pcntry=US&sap-language=EN&pid=0000009169) which costs round about 4.300€/year.

But if I would take part in the "SAP NetWeaver Cloud App Partner Program" (https://www.sapcloudappspartnercenter.com/pdf/SAP_NetWeaver_Cloud_Applications_Partner_program.pdf) there are only costs of 1.990€/year.

Or is the Partner Programm a must-have!?  So that it's planned, that the "Starter Package" should be the following account after reaching the limits of the Partner Programm-specifications!?

Greetings,

Andi