I made a small test with all traditional folding knives I own (old Opinel nr 10, Buck 112, Case mini copperlock). Of these knives the Opinel excells at food preparation. Cutting onions, vegetables in general and meat is a breeze. The blade is easy to get into shaving sharpness. The copperlock is so-so in food prep, it is too small. It is a gentleman's knife for small tasks. Buck feels clumsy, heavy and overbuilt in general food prep.
Whittling wood: with it's sturdier blade the Buck is the best of these, but the grind of the blade is not optimal. Buck's comfortable handle and sturdy construction helps. The Opinel is still nice in this, the flat grind works well also in this use but binds when cutting deep in to wood. Also I have reservations how it might hold out in longer and harder woodworking sessions. Copperlock cuts wood nicely, but the size makes it difficult to handle and anyway this is not why I bought it.
Cutting cord, rope and other tasks: with rope the Buck is the best, followed closely by Opinel. The difference is not great. The sharpness of the Case is a great help in these tasks, but size does matter. When making the sheats for my knives the Case worked nicely, cutting leather was accurate and easy.
So of all of these I find the Opinel most usefull in those tasks I mostly use a knife. It is light and comfortable to handle. I intend to get a scandi grind folder in near future for general summer cottage and hiking tasks, I am thinking of Eka Swede 8 or Enzo PK 70.My mind is divided about between EKA and and Enzo as what to get next, both look nice and no doupt they are both good knives, but the Finnish Enzo leads because as a native Finn I would like to get a first class Finnish folder in my small collection. Also the user reports have been good, I know very little of EKA's.
Of course this small report is very subjective and other users might have other opinions, but this is what I found out. Buck still has it's place, no doupt many find it a good EDC knife. Still I have found I like lighter knives more. The size of the Buck is optimal for many tasks and that is a big plus. Carrying it in a sheath I made is quite comfortable but in pocket, without the sheath, I have found it now slightly awkward. So Buck needs a sheath because of the weight. I have used the same sheath with the Opinel and it fits, allthough it is quite a bit longer. Carrying the Copperlock in my suit pocket in it's sheath is easy, you really don't notice it.