Find The Parity Outlier

My:
object Parity {

def findOutlier(integers: List[Int]): Int =
  if(integers.filter(x=>x%2==0).length>=2)
        integers.filter(x => x % 2 != 0).head
  else
    integers.filter(x=>x%2==0).head
}

Other:
object Parity {
  def findOutlier(integers: List[Int]): Int =
    integers.groupBy(x => (x % 2).abs).minBy(_._2.length)._2.last
}