OK, here's my take, after comparing too many sources over the past 
few years.  Over time, I've downloaded/traded & compared:

* Soul Mates (SM)
* Soul Mates 2 (SM2)
* Twin Flames (TF)
* In The Sky Dog (Dog)

(I remember reading that SM2 is a cleaned up version of Live At Tampa)

Some of the comments below are also in my info text for SM2.  Also, as
I am cutting and pasting these comments from various places I put comments, 
I may tend to repeat some things a few times.  Sorry about that.


I find Dog to be fairly similar to SM, though SM has a slightly rawer sound, 
so I'd give it the nod, though again they are pretty similar and definitely 
from the same source recording.  Others may prefer the slightly less raw 
sound of Dog, though.  I never kept a copy of TF, though I did note that 
it had better sound than SM2 and would be the one to go for for best overall 
sound.  If, however, you want to go for the one with the best guitar sound, 
hands down SM2 is the best.  The guitar is very much up front in the mix 
on SM2, as are the vocals & organ.  The drums are definitely the hardest 
to hear, followed by the bass.  As a result, it is an uneven mix and not 
the one for best overall sound, though it's still decent.  Still, as Duane's 
presence is the main reason we all go for this show, SM2 still reigns in 
my book as the best sounding version for guitars.


Interestingly, SM2 appears to be from a different source tape than SM or Dog.  
In Layla, I cannot pick out the girl at the 3.05 point, nor the guys at 3.14 
that are on both Dog and SM.  Nor does it have the tape problems at the 3.45 
mark that both Dog & SM have.  This could account for the different mix 
between SM2 and SM/Dog.


SM2 has an odd SQ.  The guitars are definitely easier to hear than on 
SM, which is really the most important thing here, considering
that this show is unique among all live Dominos' recordings in that it has 
Duane on it.  That being said, the recording is still not great.  The drums 
and bass sort of disappear into a low frequency mud, making it almost 
impossible to really pick them out.  SM, on the other hand has a little 
more overall clarity to it, though the guitars are definitely better served 
on SM2, so take note you Duane and/or guitar fans (like me).  The other real 
drawback to SM is that is suffers from repeated dropouts and similar sonic 
problems, resulting in a very uneven listening experience.  I definitely 
feel that SM2 is a better source to have, if just because it does not have 
these sonic irregularities.  And, the guitars are more clear than they are 
on SM.  Still SM2 is not the upgrade I was hoping for.  So, trader beware.


The TF version is definitely a better balanced recording. You can hear all 
instruments equally well overall.  It also has a great introduction by the 
hall's announcer (with a nice southern country accent). Duane is mentioned. 
The guy sounds like he screws up the Eric part (calling him something else), 
though he gets Clapton right.  SM2 does not have this intro.  Though this is 
better balanced than SM2, it is still not great sounding, though not horrible 
either.  You can better hear the voices of the tapers (or those sitting near 
the mic) than you can the music.  SM2 again better displays the two guitars, 
which is THE key value of this show.  On TF, Duane's slide is sort of hard to 
pick out on Layla, which on SM2 it is pretty easy to hear.  Across the board, 
SM2 presents a better guitar sound, which is why it is still the best recording 
of this show for me.  If you are not that concerned about easily hearing the 
guitars, then definitely go with TF.

Anyway, that's my opinion.  Hope that helps.


I reproduced the below from another person's web site:
(http://www.ciudadfutura.com/ericclapton/Discografia/Soul%20Mates%202.htm)

Note: This show is of historical importance, as it is apparently the only 
extant live performace with Duane Allman on guitar. better quality, and more 
complete than Live at Tampa. In addition, it appears to be a 
remastered/modified version, as brought to my attention:

This disc sounds much different than SM. The parts of Layla where 
you can hear people in the crowd talking are gone, but there is a bit of 
background hiss, and there isn't any on SM. So I went and dug up Live at 
Tampa, and made an astonishing discovery....SM2 is a cleaned up version of 
the better source tape!!! It still has a bit of the hiss present on Live at 
Tampa, but is much more listenable. (TD)