Why trade? Get the LCP. You can have another gun. It's alright. You're among friends. Get the LCP and compare them. Decide which you wish to carry, and when, unless you want to carry them both (real fast reload...)
You have a wide range of ammo options for the 442 but not so many for the LCP. Regardless, I carry both calibers at different times. The 380 with straight ball and the 38 with heavy cast semi wadcutters. Neither load is P+. Both work.
Both choices have their place. No matter what you decide, one or the other or both. It will be interesting to hear your comparison if you get the LCP. Mikey.