28-90mm f3.5-5.6 Aspherical Macro - Vs. Mini Zoom Macro 28-8

[haans _gruber]

I recently ordered a Sigma Mini Zoom Macro28-80mm f3.5-5.6 with a 70-300mm f4-5.6 MacroSuper II. They accidentally shipped me a 28-90mm f3.5-5.6 Aspherical Macro with the 70-300.I am wondering if anyone can explain to me in layman's terms the difference between the two lenses and the reasoning on whether I should return these for the lenses I actually ordered. peace, haans