If you feel it and don't like what you feel, that is a problem. Otherwise no. One does have to wonder how such a thing happens. Is one bike also much bigger than the other. That could be a bigger problem than the difference in the cranks. If both bikes are your proper size, the cranks shouldn't differ by more than 2.5 mm. Unless you mistakenly bought the wrong crank for a build that you did, of course.