The real issue is how usable is it at the super long end. The SX50 is the most usable so far, and its difficult for me (I've had 3 of them now).
Canon patented a 100X zoom lens a while back, but I hope other improvements come first. Right now, I'm not finding much practical use for my SX50 HS.
I'm also wondering about the so called Wi-Fi on the Nikon. My wife has a S-9700 with Wi-Fi, but its a joke, you cannot transfer files to a PC with it, just to a smart phone or tablet. The Canon Wi-Fi is klunky, but looks good by comparison.
I ended up buying a eye-fi pro card, and its not only fast and works well, but I can pop it into almost any camera that has a SD slot, and away it goes, both raw and jpeg files straight to my computer if I'm in range, or to my computer via the eye-fi server if I'm not. I bought a CF to SD adapter and tried it in my old 5D classic, but it did not work.