Difference between rudimentary and vestigial organ Share with your friends Share 0 Lol answered this Vestigeal organs are rudimentary(no apparent function). Both are usually used synonymously in biology. 0 View Full Answer Aravind.t answered this ok -1 B Ashwini answered this Vestigial organs are those organs found in some living things but they do not perform any function but used to perform in the past. -1 Rishika Mathur answered this Basically both are same 2