It's a unique design and looks like it would be very comfortable to wear. It would be a great ring for anyone who works with their hands a lot and doesn't want to baby their engagement ring! Also I love the warmth and tradition of yellow gold, and the flowing, feminine design. It's obviously not a traditional approach, but if you love it, in my book that trumps tradition. My main concern would be if the width might present a problem when worn with a wedding ring. I have a band ring that I think is about that wide (without the wedding band) and I find it easy to wear, but comfort depends so much on the individual wearer.
Do both rings comfortably fit on your ring finger? I would wear those without a doubt! Love the buttery rich yellow gold on each ring. If your finger feels constricted, you could wear either ring on your right hand. personally, I prefer your choices over many of the blitzed out mass produced styles out there.