Racquetball would win. The reason being, it is the one that most resembles the tennis ball bounce and the racket head is the closest in size. Also, its the one where the player needs to cover more area and swing on the move much like tennis. Squash p...
Penn is by far the most popular brand of racquetball, and is also the brand used on the pro tour and most racquetball tournaments. Ektelon is also a good brand, I've heard some claim that they play a little faster. I personally do not care for Wilson...
The first one is better for begginers, u want the bigger head when u are first starting out.