I have two albino BN pelcos in a tank with CRS and RCS. These aren't the long-fin variety but I'd imagine they are similar in behavior. Mine seem to leave the shrimp well enough alone and stay pretty busy on the tank.
They look great against dark substrates too.
yeah they do. im just watching them and the look like ferrocious eaters when they are grazing on my java moss. im just scared if the shrimps hatch on the moss that plecos gonna run into some tiny snacks. lol