Nikki and Tiffany are outstanding pitchers. Both are unique and different with the ability to dominate. I don't think you can compare the two until they go head to head and then, you have to look at the big picture - what is around them... Both throw hard with great movement on the ball, not something you see all the time. Nikki has been clocked at 67 with tremendous control. Tiffany has an outstanding rise ball and curve ball.