Replying to I'm going to get one TM and one PE... need some advice

Do I use the Troublemaker on the left foot, and go with the Public Enemy on the right foot... or vice versa. Both these skis are so amazing I just have to get them both. I'm thinking about going with the PE on the right foot just cause thats the foot that hits the rails first and I heard they are more durable..... Also do you think that it might fuck me up that theres a difference in size with the 175 TM and the 169 PE. Where should I mount the PE? Go easy on me guys... I'm just a noob