Bt11 is one of the older Bt maize, first authorized for cultivation in 1996. Bt11 produces the Bt toxin Cry1Ab against lepidoptera such as European corn borer (ECB, Ostrinia nubilalis and Mediterranean stem borer (MCB, Sesamia nonagrioides). In addition, Bt11 is herbicide-tolerant against the glufosinate-ammonium (BASTA, Liberty). It is currently authorized as food/feed, and this authorisation is currently getting renewed.
YieldGard VT PRO.RR2 is a hybrid by Monsanto combining Bt-toxin production and herbicide tolerance against Roundup (glyphosate).
MON89034 produces the Bt toxins Cry1A.105 and Cry2Ab2 against a number of lepidoptera. NK603 is a glyphosate (Roundup) tolerant maize.
For details on the individual events please check the individual entries for MON89034 and NK603.