I'm new to this forum but have been reading it for a while. I will do intros another day but joined just to help answere your ?. If it still needs answering. I see it on every forum. You got lots of advice but nobody answered your ?. I have used a 7D several times and own the mkll. The answere is how you intend to use the camera. The 7d is designed for sports and nature. The 5d for landscape. Both will cross over well since they are latest models. The 7d has the speed and fast fps for action coupled with the not more advanced but higher focus point focusing system to better track action. Wildlife is served by the crop senser that brings a native 1.6x magnification that the 5d needs a 1.4x converter to get even close to it. The 5d has the higher pixel count and because of this the slower processing speed and 1/2 the fps. Both are really good low light shooters. If you do landscape with the 7d you really need a +/- 10mm lens because of the crop. The 5d ff is pretty good with a 17-40L. On the FF a 24mm is pretty wide. On the crop 24mm is almost a std. lens(34.4mm). An if it's important the 5d has the better video but no external video on/off and no built in flash. The 7d is slightly smaller and lighter not to mention less money.If your thinking semi pro get more camera and more glass otherwise probably won't matter.
Your sample photo of the little girl is better for the 5d but the duck is the 7d. Depends on which is your stronger shooting type. Your two photos represent 2 completely diff. photo catagories. As for lenses of course L glass is better. But keep in mind that while you debate the merits of each that guy over there with the plastic fsntastic just took a couple of award winning photos. Glad to try and help. Let me know if there is other info You would like me to try and answere. You already know the 7d well. The 5d is prtty much the same just intended for a diff. type of photography. Know your subject first and the camera will follow.