Ed, I've always played the G Sharp, NOT the G natural. I know, I've had former guitar teachers whose claim to fame was that they could ultimately hold a pick (sarcasm). They showed me more wrong ways to play Howe than even Steve could probably invent! That's the thing about Howe to play Howe accurately; I've been in many fights with musicians over what note is where and they always disagree with me.
One guy from high school actually bet me five bucks that I was wrong about some note or chord from CTTE. I won five bucks when I played along with the LP! Howe puts in notes that really almost train YOUR ear to the music instead of vice-versa. When you play them, you think "No way!" but they ARE the notes he is playing. I don't read music; I play by ear, so I've always heard these little weird notes which just make logical sense in the beautiful, skewed logic of Howeuniverse. That's why Clap is so damned hard to play well. There are easier notes to hit, only one fret off, that sound close. But, they're not the right ones.
Also, Steve changes things constantly live. I've never seen him (on dvd) play the jazz chords on the second verse of Roundabout as he did on FRAGILE. They're hard to finger quickly. Even Alex Lifeson changed the difficult beginning of Freewill's solo on EXIT: STAGE LEFT. You get the feeling that it's a whole different animal up on stage, and simpler is better!
That's one of the reasons I try to learn studio versions of songs. With very few exceptions, the live tracks are always simplified...