The brain of human apes is larger but chimpanzee apes are stronger. Also chimps have much better short-term memory than human apes.

The chimpanzees always win short-term memory tests.

Chimps Have Better Short-term Memory Than Humans

"A Japanese researcher presented a video showing the remarkable abilities of a chimpanzee named Ayumu, here at the annual meeting of the American Association for the Advancement of Science (AAAS) Thursday (Feb. 14). When the numbers 1 through 9 appeared randomly on a screen and then disappeared, the chimpanzee was able to recall the exact sequence and location of each number. Ayumu has also learnt numbers 1 through 19 and is able to touch each one in ascending order, which hasn't been shown before, Tetsuro Matsuzawa, a researcher at Kyoto University's Primate Research Institute, told Livescience."

This 3 minute YouTube video is fantastic. It shows chimps have a short-term memory that's many times better than humans.

We definitely have more powerful brains except of course the brain-dead creationists.

Small but distinct differences among species mark evolution of human brain

"Despite differences in brain size, the researchers found striking similarities between primate species of gene expression in 16 regions of the brain -- even in the prefrontal cortex, the seat of higher order learning that most distinguishes humans from other apes."