“better” can’t really be measured on that level, but if we go by success, then, off the top of my head: https://en.wikipedia.org/wiki/Mikhael_Gromov_(mathematician) I admit I had to check, but Gromov is only one year younger. Works in the same field (complex geometry) and created whole subfields essentially by himself. With the exeption of the fields medal, he has won just about every prize you can win, most importantly the Abel prize.