On-board audio is overrated in my opinion. When Disneyland added it back in '95, I was not a fan. Still am not a fan to this day. And Disneyland's Space Mtn is now almost always the half-a&$#@ Hyperspace version now. I absolutely love Star Wars, but man is that overlay just done on the cheap and not that good. It was a nice change to be able to do the regular version this past winter, but Disneyland just switched it back to Hyperspace ((SIGH))
I still voted for Orlando's Space Mountain over Anaheim's. And no, I am not biased LOL I grew up in southern California and have been on Disneyland's probably 300 times by now and rode it many times well before I got to ride Disneyworld's. I stated it before, but the biggest reasons I prefer the Magic Kingdom's over Disneyland's is because of the exterior mountain, incredible queue and music, the lack of on-board speakers (hate 'em), the overall scope and size of the mountain and the track layout is more fun and interesting than it is in Anaheim. All of those reasons helped me vote for Orlando on this poll.
I would have probably voted for Paris if I had actually ridden on it. That older Jules Verne version always looked incredible!