One time I was coming in to Zanzi from Tanga, an ATR-72 was inbound from Mombasa behind me. The controler advised Precision that there was a van in front of him also on a straight in approach. The Captain arrogantly said that he was much faster than the van and would easily be ahead of me.
Well several minutes went by and I still had not seen this ATR, starting to get worried that this guy was coming up right on my ass. I heard him call the tower and ask if it was a 208 or a 406 in front of him, the controler said 208, to which the exasperated ATR captain said "he's very very fast"
He caught up with me in the end, turns out those 72's are not as fast on the descent as the 42's.