IMHO having owned both of these balls,there is no comparison.The lightbulb core in the Avalanche (though old design) rolls light years better than the pancake and puck in the Tornado! It gets down the lane well but has a much more controllable breakpoint.With a little surface,the Avalanche actually works well on medium oil conditions,something the Tornado could not do with any surface.I would take a lightbulb core over a pancake and puck anyday!
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the pooh