Strrength in metals can mean a lot fo different things. A good general measure is the yield strength which in simple terms means the point at which the material begins to yield permanently. The yield strength of the aluminum we use is between 40,000-45,000 lbs per square inch, the brass is between 20,000 and 25,000 lbs per square inch. Aluminum has a good strength to weight ratio (its light but fairly strong) and it is fairly stable under various temperature changes; a good example of that is its use in aircraft. Brass of course is more dense/heavier than aluminum so as a hammer brass works better normally becase of the added weight although aluminum would withstand the impact just as well. The phenolic material is extremely strong and stable under most conditions. it has high impact resistance, doesn't conduct heat or cold, is fire proof for all practical purposes and is chemical resistant. The wood handle is a laminated wood, which means it is resin impregnated. It make a good hadnles, but will definately show hard use more easily than the phenolic. The comaparison between the two materials in terms of strength, etc is: better (wood) and best (phenolic). So if you are looking for a good heavy/hard use knife and don't want a "pretty" looking knife, the phenolic and aluminum version is the one to buy; if you wnat a good all around knife with a more expensive look, then the wood and brass version is the one you want- but you will also pay a little more for it. Hope that answers your question; if not or you have another one, let us know.