Speakup compared to the other linux/unix screen readers

[Michael Whapples]

Hello,
With all the other unix systems available, I am wondering whether it is 
worth learning about another text console screen reader so I could use 
non-linux unix systems. My question is though, how do the alternatives 
compare to speakup? Things I am considering in how they compare are:
* How good are they to use
* How advanced are they (speakup has a variety of tracking modes, window 
to read from, etc)
* How frequently updated are they (looking at the yasr website the last 
release was over a year ago)

So in comparing them is it worth looking at them or is speakup much 
better and the lack of it would make working on the other unix systems a 
pain?

I know about emacspeak, and its probably worth learning it for an 
advanced editor, but I was more thinking about general screen readers 
like yasr.

Michael Whapples