I think they get progressively better as the cards become coins. The "+$2, +1 Card" one is probably a weak $5 card, while "+$1, +2 Cards" is a strong $4 card. The terminal Gold is pretty strong (but probably balanced) at $5.
But pricing isn't always a direct map to strength. Other factors go into it, like how much effort is required to unlock that strength. Receiving money is easy -- you get the coins, and you spend them. But it takes a little deck-building to unlock the power of what you can do with +Cards. More specifically, the hybrids are probably better X's for BM-X games, but in an engine deck with Villages, you'd rather have the +Cards.