A lot are based on each other, or OEM'd from one supplier.
Now, Hobbywing have made speedo's for a large number of companies, including;
SpeedPassion GT series, Venom ProBrushless, MuchMore Fleta3.0 - All OEM's of the Xerun 120A V2
Orion R10 - Which is made specifically for Orion
Yokomo BL-R3 and HPI Flux - both OEM's of the latest V3
ORCA, and the lastest SP Reventon's aren't HW esc's. Also be aware, there are fake copies of HW's out there as well (Hobbypower, Bullistorm etc)
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