Mid-lane read is for arc and control.  So if you are on a pattern or if you have a style that needs to add control, then go with a ball that reads the mid-lane well.  But if the shot is wide-open for you, a skid/flip ball will generally give you more power.

If you look at the trends in bowling, urethane balls in the 80's had a arcing style hook.  Resin came along in the 90s with more skid/flip.  Resin had less control but a lot more power.  Ever since then they've been trying to find a way to have the best of both worlds, control & power.
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Good luck & good bowling