What is the D&D sepex?

seems that the D&D sepex advertised by electric motor sport and thunderstruck ev is very similar to one listed as a series on on cloud ev. Maybe there is both a series and a sepex option

sepex

thunderstruck

http://www.thunderstruck-ev.com/ddmotor.htm
listed as a ES-10E -33( sep-ex)

Size	6.8" OD, 11" long (w/o shaft)
Shaft	7/8" x 2", 3/16" keyway
Weight	57 lbs. + (8lb DCX, 5lb Sev) cntrlr

electric motorsport

http://www.electricmotorsport.com/store/ems_ev_parts_motors_sepex.php

Dia. 6.7"........Length 11"........Weight 56Lbs.........Shaft dia. 7/8" W/ 3/16 Keyway

Series

cloud electric

http://www.cloudelectric.com/inc/sdetail/168

Current: 140
7/8" single-shaft
base/face-mounted
6.7" Dia x 11.53" Long
35 HP peak
Actual Weight 57 lbs