MicrostockGroup

I've been searching high and low to see a comparison of the 28-70 f/2.8 older lens to the new 24-70 f/2.8 lens on a Nikon D90. Most of the comparisons are on FX camera's. With the internal focus on the D90...would the 28-70 work just as well as the 24-70? I've read the sharpness is about the same, but like I said these comparisons are on FX cameras. Any one had any experience with this? I've found some used 28-70's and they are about 500.00 or 600.00 cheaper than the 24-70's. Is the speed of both lens about the same since the D90 has the internal focus?

I keep researching and one site I found said the 24-70 is better on the FX bodies and the 28-70 was better on DX bodies. Did you shoot with the 28-70 on both?