Yes. Because it was by Sunrise, and with character designs by Hisashi Hirai. Gurren Fagann is by Gaynax, using recycled generic FLCL reject designs.
GSD is part of the juggernaut that is Gundam. Need I say more? Gurren Fagann will be almost forgotten in a few years, merely remembered as the biggest, ugliest, smelliest turd produced by Gaynax. Until they produced something bigger & smellier (but then, Gaynax & it's works went down the crapper after FLCL)
Ergo, Gundam SEED/Destiny is SUPERIOR to Gurren Fagann.