The very very bad thing about the "Super 10" is that if you have a lifetime experience shifting the "normal" 10 speed you may (will) eventually forget the different shifting pattern and spread your tranny all over the highway.
Someone earlier mentioned the Super Ten is no longer made. Makes one kinda wonder why. I thought the "Super" was the basis for the current "Auto Shift" and Ultra Shift" automated Eatons.
However, lots of us have crawled home or just off the freeway stuck in the low side of the older Fullers. Yeah, a big advantage of the Super Ten is that if new to shifting, you can get lazy and just use five gears.
Or, if your "spliter" fails, you can still physically drive the Bus Conversion or heavy truck, something not possible with the older range shift type of 10-speeds. Guess it is all in what one is used too. RTO-910's are cool.
Fuller years ago also had a model called "The Snapper". Had just four (4) gear positions; each with an under, direct and over. Supposingly didn't need to use the clutch. Utterly failed commercially. HB of CJ