Clone Sonic and Clone Sonic "Tune-Up!" as I draw from the beginning in my comics.
(and the rest of Blue ones, except Nightmare Sonic "Spooky-Up!"
*he has 5 spikes* on both side of his head)
It is and not only in addition to my artistic style, a reference to:

Art used in FNaS Collection:

As you can see... Clone Sonic has 3 spikes on the two sides of his head.

Even in Toasty FNaS Clone Sonic has also 3 spikes on either side of his head...

And a screenshot from game on what is this picture refered to:

Now you know why my version of Sonic has such a "Spike-cut"??

Mind blown! Now everything is clear!

Sorry. But, I don't care if this is for some, "Weird".
This is how I draw him... as I said. This is my choice of my unique art style.

(And even if somebody will comment again about it,
then I'm not gonna repeat million time again why)

Thanks for attention!

Oh, and there is Nightmare Sonic (Original) to know what I'm talking about.
As well (5 spikes) as the reference is used in Fiercy Forces.
(as well, this Picture is not mine):

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Gotta continue to draw... Cya!