I have no experience with any of the Coda preamps; however, suggest taking an online look at Terry London’s review in Stereo Times on the 07X. Based on his findings, the 07x sounds absolutely phenomenal! It would be surprising if the lower cost CB or CP preamps yield as satisfying a performance as Terry reports for the 07x.
To quote Terry's review conclusions on the 07X "It is the best synthesis of what solid-state has to offer (transparency, clarity, low frequency extension, control, micro details and slam/speed) and of what tubes have to offer (tonality, color, holographic imaging, three dimensionality, and soundstaging with a sense of air around the individual instruments) that I have heard in over thirty years listening to scores of preamplifiers." Placed on Stereo Times "Most Wanted Components of Te Decade" list!
I am guessing the lower cost CB and CP preamps are excellent but not in the 07x league. Then again, depending on the total synergy of all system components with any of these preamps, anything may be possible. More likely though, the 07X will win the race by a decent margin, providing the overall system synergies for all preamps (CB,CP, 07x) being compared are on an even keel. Just a guess from the 07x review.