- squash: more control over ball placement. Since the ball is fairly "dead", there is more time to think, and there are so many potential "moves" on where to place the ball. I found with rball, a lot of the hits were more instinctual reactions, rather than deliberate placement. Obviously player skill levels on both games vary, and there are some super sniper rball players

- the "tin". Squash has a spot on the front wall which you cannot hit. This is a bit of the secret sauce for squash, as it prevents some of the rball instant kill shots.

- moving towards the ball, rather than ball to you: in squash, you really need to read where the ball is going, and get yourself there. Since the ball is barely bouncy, its not coming back over to you easily. This requires you to move a lot around the court - lots of soccer-like movements, quick sprints, deep lunges & reaches, side movements, etc

- volley-time: you'd be surprised how long they can go! But you're right, its usually shorter. For evenly matched opponent, I generally have really good long intense ralleys, where its feels like a fight to the end - tons of fun.

Other thoughts:

- squash is pretty international (uk, india, france, egypt, colombia, etc) whereas rball is fairly usa-centric

- rball has been reducing in popularity, whereas squash has been increasing. Shouldn't matter too much, but for example in NYC, I found it harder to find rball players (most were older people; courts often un-used); meanwhile, the squash courts were always popping - people of all ages (even kids). Also, I found the rball courts were older and lesser maintained, whereas (many, not all) of the squash courts seem to have been recently renovated. E.g Equinox in NYC has 5 really nice glass squash courts.

I do think both of the sports are tons of fun. Each has their own personality. The instructor I learned from teaches rball and squash. He started with rball - competed nationally, and till plays it - but fell in love with squash as his true love, and only does squash competitively now. Anecdata... give it a try, and give it some time. Took me a few sessions before I really just got hooked, then it was just magic. Best of luck!