It is safe to say both male and female coaches are capable of possessing all the qualities you want in a great coach: motivational, committed, knowledgeable and can lead by example. I've had more male coaches in my life than female coaches--mostly male though high school and then two sets of women coaches in college. Across the sports, both the men and women I played for possessed these qualities, that is, that the large majority of their coaching styles overlap.

My initial reaction was to say the biggest difference in my experience was that the female coaches were stricter and the males were more laid-back. But that can most likely be attributed to the fact that the women coaches level of play was much higher... and the men I played for happened to be laid-back because that was their individual personality, not necessarily because they were male. There may be too many variables to make a conclusive call.