The MKZ is embarrassingly similar to the Fusion (a great car, don't get me wrong, but my $15,000 fresh-outta-the-fleet V6 Fusion shouldn't have the exact same shape as a car Lincoln's trying to sell for twice that), but I think if it didn't exist people wouldn't be proclaiming the MKS a Taurus rebadge at all. The MKS looks like the Taurus should look, maybe. But nobody, and I mean nobody, who doesn't have a working knowledge of Ford's platforms is going to see the giant-greenhoused Taurus and then this car and guess they're in any way related, even if they're side by side.
Don't let the MKZephyr's gussied-up-Fusion looks color your view of this car, which looks to be Lincoln's best and most differentiated entry since the LS. (And just in time; is Lincoln selling anything that doesn't look exactly like its Ford counterpart in profile at this point?)