High end SD wide lens on HD?

Hi everyone, just wanted your opinion on this… I’m shooting a red carpet this weekend, I have my standard Canon KJ17x7.7mm HD lens or a Canon SD J11x4.5. The 4.5 is certainly sweet for those cramped spots where they fit three of you in a place just wide enough for one.

I can’t find the MTF details on each lens but since I’m shooting on a XDCAM EX 350, in the real-world, will anyone notice the difference in lenses? Pixel-peeping on a Sony PVM OLED monitor I do notice the SD 4.5mm is slightly softer with a bit more CA but that’s like zooming into 300% in Photoshop…. choices choices.