You will notice the biggest difference between Transform and HP Transform if you have a grid setup. If you have EM licensed for a grid environment, you should use HP nodes only as regular nodes do not handle all your data set. You can mix and match HP and non HP nodes but it gets tricky at some point. If you are just running on one machine or server, HP Transform takes advantage of all the cores in your machine. So there is an advantage of using it! Summarizing, HP Transform has better performance over Transform node. If you are in a grid environment, do your best to stick to only HP nodes!
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