1- If it's finite, then it's not exactly immeasurable now is it? Same deal with infinite distance (It'd only be infinite speed), unless travelling to another universe like that explicitly requires you to be able to move fast enough to escape the confines of linear time and space itself (Or be able to travel into any point in time through sheer speed alone without the assistance of any other ability), then it isn't immeasurable to begin with. Again, generally speaking, the distance between two universes is, unless otherwise stated, usually assumed to be unquantifiable but neither infinite nor immeasurable.
2. Being different space times alone ain't gonna cut it, it'd still merely be dimensional travel.