Well I wouldn't liken StS to card games like MTG. In MTG you build a deck with any cards you want/have, rather than whatever opportunities present to you. Maybe you could argue about drafting, but it a little bit of a stretch.

Also the competitive nature of MTG is entirely different to the likes of StS.

So yeah, I would pick Dominion. I also like later games built with some similar ideas, like Mage Knight for example, although this one again has a different approach maybe, but at it's heart is also a deck builder.