From what I've seen so far . Both are intense and attacking. Ruud perhaps a little more varied shotmaking and Garin a flat stronger hitter.Both have been playing really well so far. I saw Garin vs Querrey and Ruud vs Granollers and was impressed. Both are young, more or less the same age, ranking, both are more or less claycourters. Ruud has bigger weapons, Garin has more patience. 50-50 in every way.