Jan 09, 2017 - 02:20 PM
The 3577-96 is a Kohler Wellworth and 3658-96 is the Highline. Both are listed in our comparison guide as a 'GOOD' model. The '96' at the end is generally a number indicating the color, in this case biscuit.
All colors are unique to their manufacturers and unfortunately we cannot make any guarantee as to matching them up perfectly. White is generally the best color to stick with but many manufacturers of fashion bath items have differences in the brightness or glossiness in this as well.