I wish I knew why that was funny.
I guess RCTech is the only place where a line like "Losi silver step pins!!" can elicit raucous laughter. Well, at least, in a smiley icon.

Busting your chops. But really, I don't know enough about Losi tires to know what you mean...
<edit: I looked them up. Hey, they're not out yet!>
Their website makes silver or red compound both look good, but then again, it's their website where they are promoting both.
Anybody have a reason to choose silver over red or vice-versa?
Dont sweat the chop bustin... thats a requirement and part of RC!
If you had been in the hobby 20 years ago... you would have gotten it. Step pins used to be the 'go to' tire for truck and buggy. Silver was the compound to have, as gold was hard as a rock. They lasted forever though.
Dont forget wheelspin also wears out tires prematurely. So always make an effort to be smooth on the throttle and youd be surprised how much longer your tires last...