Deciding on what Azure Products to purchase for setting up of UiPath Orchestrator

Hi all,
I am looking to purchase Azure cloud computing services for setting up of UiPath Orchestrator. Correct me if i am wrong but I understand that from Web Service on a single machine that the simplest form of setup would require two servers. One hosting the Orchestrator web application and another server as the SQL Server.

I am currently comparing the Hardware Requirements mentioned by UiPath and the variation of available options available by Azure. Does anyone with a technology architect background know what are the primary considerations for selection?