The soundstage on this one is larger than Covert Coup, but I would say that the overall melodies on Carrollton Heist are recessed.
Sonically, Carrollton Heist is gigantic, which is how it gets away with having less forward and less aggressive melodic ballads.
It's not fair to compare the two on a blow by blow, the two mixtapes are doritos to donuts.
That said, some elements are similar - familiar drum patterns - tracks with highly memorable 2 bar drum cadences over extended 4 or 8 bar instrumental sample sequence. I'd say Alchemist's collaging has improved greatly over the last 5 years since the release of Covert Coup, although the overall the immediate catchiness of Covert Coup melodies are uncontested.
Black Rally Stripes shows the growth of the dynamic between ALC and Curren$y, especially in the second half of the song. Curren$y seems more comfortable and at home on Carrollton Heist - one of the most organic flows on the entire project, not to mention how the beat melts from the initial soundtrack prog sample at the beginning, and drags its final intro note to a stretched sample that pulsates with the drums to create an entire beat aside from the looped hook at the end of every fourth bar.
Aside from the glaringly obvious attempts to tie in a theme using sound bites from movies, Carrollton Heist still would sound like a more cohesive project than Covert Coup. (maybe still arguable, but I think pacing on CH is more even-keel than CC)
I'd say you could find a parallel from each track on Covert Coup for each track of Carrollton Heist (someone had asked about a Blood Sweat and Gears equivalent - 500 Pounds Of Gas comes to mind based on its similar intricacies (but I also can't help but tie the production of 500 Pounds Of Gas to the arpeggiator inspired beats from Boldy James and Alchemist's M1CS album)).
As TheDarceKnight summed up well, Covert Coup is nearly bulletproof.
Also, it's had 5 solid years to marinate - I catch myself reminiscing of all of the good times that I had while listening to Covert Coup, and those moments will more than likely outnumber any other project I've been listening to in the last 5 years.
Carrollton Heist kept me in a good place for the last couple of days. I'm not sure another Covert Coup is remotely possible, there has to be a lot of luck involved in creating a project that is that good - it was stupid - and most of all, it was a project that no one had clear set expectations of - Alchemist was trying an untested style while shooting from the hip with those types of beats, and Curren$y had never worked extensively with ALC prior to (really, just an unlikely musical pairing as far as I'm concerned based on Curren$y's catalogue prior to).
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This one got me to catch the vibe of the whole tape...Feels like Life Instructions but mellow enough to be Ventilation...