Yup, that is a gentle, but good remaster of the two Bolin era releases on one CD from the BGO label, I have that too. Before that came out some years ago, there were only the original dull-sounding Atco CD releases as well as some limited quantity loudness war-boosted CD-Rs from the Tommy Bolin Archives, no idea how legal these were, they have over the years decayed to non-playability in any case (the fate of all CD-Rs).
But whether on vinyl or CD, Bang was for whatever reason always the more energetic, ballsy production (in so far the Gang was indeed back with a BANG!). Miami sounds laid-backish - I guess the recording location left a mark! And/or Bolin's galloping drug habit, by that time he wasn't very happy with the James Gang anymore.
The first song I heard from Bang (or indeed from the James Gang who meant nothing to me then) was this one - at that point I wasn't even aware of the Purple connection via Bolin (I wasn't yet a Purple fan, would you believe?), but I liked the track with the wordy lyrics and Roy Kenner's Elvis impressions at 01:44. The slide intro was Bolin at his best (panned from left to right and then right to left, I like silly stereo stuff like that
), there was this cool funk part in the middle of it (2:07, sounds like a Come Taste The Band outtake!) and the whole song was pleasantly lively and full of joyous energy - thinking about it, that is exactly what Miami lacks, it doesn't sound like they had fun anymore.