haha, quite funny i see this thread now.
I used to play Citadels a lot (a game I could even convince my sisters to play with me) and wished for a new game on christmas (cause my sisters never know what to get me)
and I chose Dominion, as I explained it to them, one said: it sounds like Citadels.
And I strongly disagreed cause I don't see any similarities (besides the medieval time of course):
but she said Cards, Gold, You Buy Cards and Take them in your "deck". I know you can't compare them but for a person being not into games too much, they might sound similar
She will probably completely disagree after we played Dominion I guess