Can't say that simply because of a picture. The CCA conductor (White) and the pure copper conductor (Blue) are equal in current carrying capacities, due to their composition.
Copper is a better conductor than aluminum (Less resistance), but aluminum is very cheap in comparison. Knu's KLM cable has to be thicker to handle the same load that an OFC cable can. The benefits far outweigh the trade-offs... at $0.89/ft (4 gauge), its one of the cheapest wires available.
The other brands are just plain lying; Not only because of the obvious: More insulation than conductor, but they are also using CCA which further reduces the current handling of the wire.