The new Tamron brings much faster autofocus speed than the older lens and 5 whole stops of image stabilization depending on which of the three VC modes you decide to use at the time.
That lower price and the stabilization is the big selling point of the new G2 fast zoom lens. You can select between VC Mode 1, VC Mode 2, and VC Mode 3. Mode 1 “strikes a balance” between viewfinder and lens stabilization; Mode 2 is just for panning; and, Mode 3 brings the best stabilization by prioritizing the captured image and ignoring viewfinder stabilization control.
Please thank the Angry Photographer for another good review.