Broken Meeple Videos - Carson City: The Card Game Review

I always get a bad feeling when some game that's already good (or supposed to be good, I've yet to review Carson City) puts out a card game spinoff. A lot of the time, they tend to be lacklustre in comparison or at least never measure up to the original, but there are exceptions to the rule (I'll take Power Grid: The Card Game over the original any day, but that's a minority view).
So how does this one fare? Carson City: The Card Game! Will the scoring phase drive me to another rant?
(1) What is your favourite "card game" spin-off for another game and why?
(2) What game drives you to the biggest headache during the scoring phase?