Because I am not temperate enough a person to be..

...nice when you comment on my work with a coded insult.

Let me re-iterate this concept guys. Looking at an artist's original character and then immediately commenting how you think they resemble/look just like/must be based on some other character is incredibly insulting roughly 90% of the time. If you're about to type out that sentence, you better mean it as an insult, because it sure as double hockey-sticks is NOT a compliment.

Why? Because this sort of comment generally implies the following.
Your way of drawing this is not sufficiently differentiated enough from this other thing (which the artist may or may not even be familiar with) to be seen as something original.
You copied/stole that character design, right?
I, as your audience, cannot tell the difference between two characters with similar hair styles or outfit colors, and those things are forever associated with character X and can never be used by anyone else without being assumed to be the same thing.

So, unless you are certain a character is a deliberate homage to another character or person, please think about why you're saying that phrase. Not all men with short red hair are Ichigo from Bleach or a member of J.K. Rowling's Weasley family. Not all women with long dark hair are the same character.