Both of them are rollers but have traxxas steering servos on them. The body’s are used and show some flaking, scratches, and tears. The chassis of the scb is in great shape. The chassis on the sct is good but shows some wear and a previous owner tried to do a mid motor conversion on it but did a pretty poor job on it but it still works great the way it is. Everything works just as they should on them. Due to the nature of this hobby there are no returns so look at the pictures good and ask questions before bidding.