Proline 40 series Crime Fighter;

Crimefighters look like the blocks are more tightly spaced, and are solid whereas the Bow Ties are not so much so. I'd even go so far as saying the Crimefighters would probably do better on a bit more loamy tracks, while the flexy tread of the Bow Ties would hold onto blue groove better......pure speculation though, I have yet to see anyone with the new ones at Hot Rod Hobbies.