Hey keerym, what part of central Illinois are you still in? (hahaha just kidding with ya, you don't need to answer that)
Anyhow -- my thoughts on the 904B, simply from its specs, is that the lift height is a little low and the cab is a little high -- for certain applications. Also, turning the machine reduces lift capacity to that below the A300, which might be a consideration for landscapers looking to turn in tight areas (turning radius to outside corner of bucket is also a little more on the 904B). Finally, I'm not sure how the hystat system works on either machine, but the A300 does have a bigger powerplant.
Either way, for certain applications, I think the 904B is a plausible alternative to the SSL.