I have the original CD, single disc LP, the 2LP Rhino mastered and cut by Chris Bellman, and the MoFi OneStep.
While the CB 2LP set is an improvement on the originals in that it's bigger and more spacious, it's also tonally bright and the midrange a bit recessed. The sound stresses the strum of the guitar strings and robs the guitar and Clapton's voice of some resonance, making the sound tonally a bit pinched.
In contrast, the MoFi 45rpm sounds fuller, more natural, and more at ease. There's greater spaciousness in the midrange, and the top end is less tipped up, The whole presentation seems more real, and it's easier to listen to, to sit back, relax and appreciate.
I love the album, but as relatively good as the Rhino 2LP set is, I have always had a hard time relaxing while listening because of the tonal imbalance. The MoFi is vastly improved in that area
Is the MoFi revelatory in that you'll hear new aspects to the music you've never heard before? Not really. It just gives you a better sense of being there when it happened. For me, it's a more enjoyable experience, and worth the extra dough.