Plastic catheters vs. rubber catheters for trach suctioning

There was a disagreement at work tonight about which type of suction catheter should be used to suction an established trach. We have the option of using a flexible plastic suction catheter which is also used for NT suctioning or a rubber suction catheter. Is there any harm in using the NT suction kit for suctioning established trachs? It was put out in our staff mtg yesterday that we should be using the NT suction catheters for all suctioning including trach suctioning because they are cheaper. This is the type of suction catheter I was taught to use in nursing school and the only type of catheter that was stocked on the floor at my previous job. There is alot of resistance from the staff nurses about using this catheter for trach care. Any insight or research would be helpful! Thanks.