What is the difference between a Nikor ED lens and a Nikor IF-ED lens?

For example I'm giving two links here, please tell me which one is better and why/how.

IF-ED lens:
http://www.flipkart.com/...d822cc1f6c

ED lens:
http://www.flipkart.com/...d822cc1f6c

Martin is totally wrong about what "IF" (Internal Focusing) means. A lens designated "IF" indicates that the front element does NOT rotate during focusing. This is really only important if you're using a polarizing filter on the lens.

Martin is correct about the value of "VR" (Vibration Reduction) though if you plan on hand-holding the lens.

Buy the lens with VR and IF.

Forget the "IF" - that's irrelevant. It's actually Internal Focus and they both work that way. They are basically the same glass.

What IS relevant is that the first link is for a VR lens and the second link is not.
VR means Vibration Reduction and VR makes it a far better lens.

With VR switched on you should be able to hand-hold the lens at the 200mm end 1/60th (or maybe even 1/30th second if you are very steady and careful) and still get a shake-free shot. Without VR you shouldn't shoot below 1/125 second and preferably 1/250 second or faster if you want to avoid the shakes.

Given that the VR version is stupidly cheaper on that site, you get the best of both worlds - spend less and get a better lens!

@EDWIN - I said IF stands for "Internal Focus", and if you reckon that's significantly different from "Internal Focusing" then you've got a screw loose.

Yes, IF lenses don't rotate the front element, but that's irrelevant - because they are BOTH IF lenses! It's basically the same lens, one with VR and one without.