1. If you plan to assembly these two parts you need to link both sketches, in this case you must create control sketch in assembly and link these both sketches to it. For this you must create derived sketch for each part. (hope you know how to do this)
2. If you don`t need to assembly them you need copy, so your way with Ctrl-C Ctrl-V is good enouth
Just for info: There are two features in assembly: Hole series feature and Hole Wizard feature with propagate to parts option.