Badger5 (odd to see that name here as I associate it with a local VW tuner .. his cars are mental!).
When it comes to this choice it's easy ... neither of them!!!
Why buy the SP GT2.0Pro for around £160 when the HobbyWing V2.1 120A is around £90 (from the official UK importer) and the updated version of the same unit?
Follow the link in my sig mate and have a look! Even if you buy the LCD programming card / PC interface you will get change out of £110 all in and have access to some slightly more tunable firmwares too!
If on the other hand you feel the need to throw the extra £50 around for no reason please throw it in my direction