We have both. We registered for and got the exersaucer for our shower and then I bought the jumperoo off of craigslist for $15. So far we only have the jumperoo set up, but he loves it so we're going to set up the exersaucer this weekend for him.
We have both. We registered for the excersaucer and received both as gifts. He likes them both, but right now he prefers the excersaucer - though I think he's still getting the hang of the jumperoo because he loves to bounce.
Re: Jumparoo vs. excersaucer