Roland RS-50 question...

[Ricky Denim]

Hi guys, I was saving up to buy a Roland Juno-D which is currently $899aus and then a friend of mine offered to sell me his RS-50. I have it here at the moment to have a play with it. Does anyone know where i can find a comparison to the Juno-D or know the differences? So far it looks the same, the main noticable diff is the feel of the keys are much more plastic/lighter.

I can get the RS-50 for around $400-$500 so it would save me quite a bit.
Good deal you think?

PS, a side note, if anyone has used one,do you know how many types of arpeggio patterns it can do? So far i've only found 4 and they dont even move up/down lol. Doing a search I thought i read 200, so maybe i should reset to default settings.