Is my 7 week old Silver Laced Wyandotte a pullet or cockerel?

[sixchickadees]

We're new to chickens, and recently got 4 chicks: a Buff Orpington, a Plymouth Rock, a New Hampshire Red, and a Silver-Laced Wyandotte. Our SLW seems to be looking a bit like a rooster, especially because his/her comb seems significantly more pink/red than than the other 3. They will be 7 weeks old tomorrow.
Could somebody give an opinion as to the gender of our SLW, please?
Here are some pictures:

Thanks!

 

[sixchickadees]

Here is the link. It didn't work the first time.
http://www.greentearex.com/Green_Tea_Rex/Sparrow.html
(by the way, Sparrow is his/her nickname

)

 

[Tanichca]

That looks like a roo

 

[sixchickadees]

Ah, we're really hoping he/she is a pullet... Thanks, though.
I accidentally posted this in the wrong category. Is there a way to change it?