cypress vine vs. cardinal creeper

In case you missed it (and this is not exactly CNN-worthy), there has been an ongoing discussion on Facebook about whether or not the vine I described in an earlier post was cardinal creeper or cypress vine. Well, I found my seed packages and I now know that what's growing on my veggie garden fence (and pictured below) is cardinal creeper, not cypress vine (although I've included both seed packet photos). They're obviously almost identical, but the give-away is the leaves--broader and bigger on cardinal creeper. And how will I remember this? I'm going to try to remember that cypress vine leaves are very deeply dissected--resembling the needles of a baldcypress tree.