@Joshua_Ong, you might find this series of articles insightful if you’re really looking for details: http://www.addicted2light.com/2012/05/28/review-raw-converters-mega-test-part-i/
Otherwise, this is a lighter read on some of the differences between LR and RT: http://www.softpedia.com/reviews/linux/RawTherapee-for-Linux-Review-440005.shtml