I think my Spirit ran me about $80 from Lowes. I'm not all that experienced to be comparing Leatherman vs Victorinox vs SOG multi-tools. I own a Vic, a SOG, and a couple Gerbers (bought one a long time ago and have found several others since). The Vic and SOG are clearly stronger than the Gerber. I bought the Vic Spirit last year because I have confidence in Vic SAKs. No other reason other than I knew they were well built and strong. As far as justifying the cost over the long nosed vice grips, can't help you there other than to say that there are a lot more tools available on the Spirit vs the Trekker and they tend to be a bit more useable. That said, the pliers is the most common of the tools used for me. The other stuff is there if I need them. I view the multi-tool as expanding my capabilities and options (vs duplicating). But for real work, I'll take regular tools any day over any multi-tool. Remember, this is for the woods and you aren't likely to have your tool box with you. I feel sure you would be comfortable with a Leatherman product. Using and carrying a multitool takes some getting used to. I still tend to reach for the knife first.
The Endura is a good knife. Have two (fully serrated and plain edge). I am more comfortable using the Delica personally and carry it from time to time along with my SAK Adventurer. I see the biggest cutting advantage of the Endura over the Trekker is a longer blade if that is something that you would find more useful. I would probably not carry my Endura in the woods. I'd rather carry a slip joint than either the Delica or Endura in the woods. Honestly, I would carry my Native 4 over the Endura in the woods and it has a smaller blade but I suspect a much stronger knife with the G-10 scales and S35VN steel. The SAK always goes with me or I substitute the Vic Bantam and carry the GEC #42 slipjoint.
I don't own a Vic Farmer. I tend to prefer the 111mm sized SAKs if I am going to carry one as a primary EDC. The Trekker is too fat for me to pocket carry comfortably.
Added: It just occurred to me that what the heck does this post have to do with camp knives? Of course, my tangent is to increase capabilities versus duplicating them. Just in case, the Vic Spirit would make a terrible camp knife. But that pliers might be handy for lifting a hot pot off the fire.