I...actually like the English logos better this time. I just don't like the font used for 「サン」 and 「ムーン」 in the Japanese logos, and I really love the font chosen in the English one. And I'll admit, even when they were leaked, I thought the celestial background used was really beautiful--and you can see more of it in the English logo.
But I will admit, the blue "crystal" in the Japanese Sun logo and yellow one in Moon's is really intriguing. X & Y used the Mega Evolution double-helix in that scenario, and ORAS used the Red and Blue Orbs. I don't think the crystals are related to anything of that caliber (I don't think they're gonna introduce a new "evolution method" so soon after implementing Mega Evolution and its subsidiary, Primal Reversion), but they must be of some importance. Even the Japanese logos of, for instance, Black & White didn't have anything special going on in that ン. Perhaps it's something relevant to the plot? Or maybe it is related to Mega Evolution/Primal Reversion after all but in relation to the as-of-yet unrevealed mascot Pokémon?