Magic Pie vs 901 pro

[edwilson62]

I must admit that speed is important for me and I understand that the 901 is quicker than the Magic Pie with external controller.  What are the other pros and cons that I should consider?  What are people's recommendations?  Any advice is appreciated as I expect to purchase a kit shortly - I already have a 48v PING LiPO battery 20Ah.  Thanks Ed