Penny + Giles Faders. 3000 vs. 8000

So what is the difference between these two families of faders aside from the length options?  Is there one considered to be better than the other?  While price searching, I assumed the 8000 would be more expensive (higher series # means better right?! ).  But after seeing prices for either 100mm or 104mm faders on www.audiomaintenance.com, the 8000's are consistently much cheaper than the 3000.  I don't believe that the extra 4mm of length is making that much of a difference.

So what's their story?

The 8000 series is designed to compete with Alps in the market of lower cost cp-faders. It is mechanically and pin compatible with 100mm Alps cp-fader.

I would recommend the 8000 series. Or Alps, it is cheaper that P&G and there is no difference in practice. If the brand is important to you, then choose P&G.

The 3000 series has slightly stronger construction but it has tendency to get stuck when it comes old.