LSR and JMC both are reputed colleges. If we compare then LSR is definitely a better college than JMC. LSR is the best girls college in DU, followed by JMC. 

However, it’s best to choose the course of your interest over college. As the course will have more effect on your future. So, research about the course that you are interested in, in both LSR and JMC. 

In general, as a subject, Economics Hons has better scope than Statistics Hons. However, if you are interested in numbers, Statistics is a better fit for you.