They do. That is why they have been clashing. There were a number of instances of fights between the two breaking out, running each other off the roads...stealing bikes...etc

Cossacks were paying tribute to the Bandidos, but found out other Bandido support clubs either paid a lot less, or not at all.

So they said fuck the bandidos, and stopped paying all together and started wearing the texas rocker (a no no without bandido permission)

Wish I had the article still, it was very informative and listed all the clashes between the two