Hi
We have both the CLX and the SLX of similar length. IMO the CLX is good value for money but is quite whippy when compared to the SLX. It is especially noticable when used at full stretch at an angle - window above conservatory cleaned from the side. Although the CLX is a brilliant everyday pole and I would recommend it to everyone, my next purchase will be an SLX because it is so much stiffer.
The CLX appears to have a much more robust outer coating, so I presume the latest SLX will be similar.
Spruce