I spent a few days working with both poles & can honestly say that without doing that test I would never have noticed any difference in rigidity between the poles in normal day to day use. I did notice the difference in weight though,... The SLX is noticeably lighter & with the extreme brush & gooseneck feels better balanced. I would expect that this difference will only be more pronounced with longer poles.
The Elite pole is brilliant,.. 10 out of 10.
The SLX is better,.. 12 out of 10 at least.