The second profile has over 3k more int (better gear and 15-20 levels higher augments), 6% more CHC, 60% more CHD, 150 more DPS on the weapon, and roughly 1000 more paragon (which is another 5k more int). All those things add up. "Seemingly similar" is a bit of an exaggeration here, since there are so many differences - some small, some a bit bigger - but accumulated over all of them the second wizard is far, far ahead. But at least it gives you something to strive for. There's always room for improvement!