I was considering the same two tires for the CIVIC in my signature(195-65-15) and actually a 3rd. The Bridgestone Turanza QuietTack as well. However, the QuietTrack didn't come in the size I needed for the CIVIC.
I chose the RT43 mainly for their price advantage at the time I was buying as I did get the General $50 rebate and no rebate for the Conti's(again, at the time I was buying).
I have read too many mixed consumer reviews on the Continentals from a variety of sources. However, the CTCT does score well on the Tire Rack & Consumer Reports and does in fact meet my criteria thoroughly as does the RT43.
I am(we're) on our 3rd set(4 tire sets) of the RT43 for different vehicles and we have liked them very much in all 3 vehicles thus, my recommendation for the RT43s. They're a high scoring tire in multiple tire testing sources, high in customer satisfaction & reviews and priced very well.
And if you do choose the RT43, wait(if you can) for the next $50 rebate(VISA gift card). It'll be offered again soon even though I don't think you'll go wrong with either tire brand, especially if you can get the Conti's for $140 off w/rebate.
^^^This may sound a little contradictory but,it's not meant to. In other words in this case, buy by price!