(This is posted in the favorite Bond soundtrack thread too.)
I also just got this official expanded edition. I happen to have the bootleg as well, but want to support official releases. The sound is much more expansive. Included are both film versions and extended versions of many tracks. The bootleg had some of Nic Raine’s City of Prague Philharmonics tracks recorded on Silva records (GoldenEye and Tomorrow Never Dies), as well as the logos music and Madonna’s title song.
This expanded edition is a much more rewarding listening experience. The score presentation is presented in chronological order, and then the bonus tracks. Yes, Arnold delves too much into the electronic, but you can hear hints of what was to come with his Casino Royale score. I hope they give this treatment to Arnold’s other scores like The World Is Not Enough (TND already has a score edition.)
FYI, the 3 disc version of Arnold’s Godzilla score is also worth checking out. I was listening to his Independence Day and Stargate scores before he was tapped for James Bond. If LaLaLand can one day give us a Moonraker or Man with the Golden Gun expanded release, that would be fantastic.