Philosophy in general, and Logic in particular, can be excellent to challenge and stretch ways of thinking, which in turns is useful for the LSAT and law school in general, by making the mind more nimble, more critical, etc.
However it is not a technique designed to train for a multiple choice test that can be tricked, where direct LSAT classes can be helpful. Those classes don’t teach thinking, they teach tricks 
hence the sometimes opposite directions given by College Logic and LSAT prep.
All in all PPL and LHC are two excellent majors. In addition, you can take one or two classes from the other stream if you so wish.
What will matter is pushing yourself toward excellence regardless of major chosen.