I have a Canon Xl1s. I was considering buying another Xl1s or possibly an Xl1 to film scenes where 2 cameras would make production move along a lot quicker. While filming a scene with two characters in conversation, would there be a noticeable difference between the character filmed with the Xl1s and the one filmed with the Xl1? I know that in low light, the S model is a little better but is it a noticeable difference? I ask this because Xl1 models are a couple of hundred dollars cheaper in some cases.