Yes, I have installed 4.4 in the second system keeping miui 13.11.8 in the first system. Both the OS working perfectly. Many Thanks to hvung1982 for his awesome guide and the master Ivan. The dualbootswitch application is working like a charm.
BTW, Is it possible to install any other ROM inplace of 4.4 kitkat in the Second System keeping the stock miui 13.11.8 in the first system?