Both are incredible balls. As a slightly Speed dominate lefthander I drill more stronger equipment. The Absolute I would say, with all things being equal, is stronger down lane. Stores more energy thru the head and makes a continuous strong turn. The Grudge reads a tad earlier but still provides a great continuous motion. either was you can not go wrong with both of these balls.
used the Absolute on Chameleon last night and played 6 - 3 for all 4 games shooting 955. Just a beast.