I have both and the differences are this.
SSX:
negatives
a little expensive
no reverse
programing is a little harder
wires are soldered directly to the board
positives
small size
no fan needed
speed passion
negatives
larger size
needs a fan
positives
easy to program
lower price
changing wire lengths is easy
more programing options.
both are smooth and good quality, I prefer the SP for the reverse option and program flexability. In the 22 I think space is a issue and the ssx might be a better option.
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SHUMACHER CAT SX
SHUMACHER COUGAR SV
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