Both have a reputation of being great offensive players, but bad defenders. Amare was the main reason the suns always had an average to below average defense, poor rebounder, poor post defense, poor defensive IQ. KAT is somewhat undersized as well, not a proficient rim protector, doesn’t rly get many blocks, not the best defensive IQ either. But he is a good rebounder and stronger lower body than Amare.
IMO, Amare was a more physically gifted defender. KAT is a more intelligent defender. They are both more concerned about saving their energy for offense.