The Rucksack was the supplemental or pocketknife chosen by the late Ron Hood for its maximum utility in a reasonable size package. He uses it extensively in the video where he makes a fire bow set. In other words, there may be other choices, but the Rucksack certainly is a good one. The website is
www.survival.com .
I tend to like the slide lock but have gotten used to the liner lock carrying my SG OH PE Trekker. The beefy cap-lifter/screwdriver and that it also locks is nice. The blade shape and convenience of the slide lock on the Rucksack is better. I do not know much about the respective strengths. The StayGlow One Hand Plain Edge Trekker though was a limited run by SwissBianco so are not generally available. IIRC the Forrester is the liner lock version of the Rucksack. It has the plain edge blade and the beefy screwdriver IIRC it also comes in a one hand version but you then get the serrated blade, as far as I know.
Some go one layer up from the Rucksack and get the Outrider which adds scissors and a #1 straight out Phillips driver. Sort of like a 111mm Huntsman but no small blade. Some like the retired Atlas, e.g. if fishing, which has pliers but that is a thicker layer than scissors. If you have long fingers the Hercules is the thickest I would go. It has both the scissors and pliers and a #2 straight out Phillips driver. The Work Champ adds a file, but is just too thick for me. I have "large" hands but only regular length fingers so it feels to cumbersome or clumsy to use much as a knife.
The Hunter is a fine knife and I like the combination tool, but after some thought and use, decided I like the more robust cap lifter/screwdriver and can opener/screwdriver for more functionality as on the Rucksack. Enjoy your Rucksack!