The trailmaster looks like it's got a liner lock, which is great for one handed opening as the blade doesn't have to be very tight to lock tight, unlike most lockbacks where the spring is always putting pressure on the blade. The rucksack has a locking mechanism I'm not familiar with, unlocked by a little slide on the side of the handle. Doesn't look worth having to me, I don't personally trust plastic parts on a locking machanism nor do I want it directly under my hand while using, where it may be accidentally released. I've never used either of them, though, so they might both be rubbish or both might be great. I'm sure the rucksack will be better than it looks to me, Victorinox tools often are better than they look in my experience.
Personally I'd say go with the trailmaster, if that is the case and it does have a liner lock. However, I much prefer lockbacks myself, two-handed opening though they are. In my experience it tends to be better at turning a folder into a fixed blade when open.
Pete