I think it does count as different kind of ketchup - however if you plot the popularity of different ketchup flavors - I am guessing you'll get a pointed peak b

I think it does count as different kind of ketchup - however if you plot the popularity of different ketchup flavors - I am guessing you'll get a pointed peak bell curve - whereas mustard would give you a longer tail curve. My point is that examples exist (I consider BBQ sauce as a variant of ketchup) but the distribution is much skewed in favor of 1 flavor for ketchups.