Post this on Boof and you will get plenty of beta.
Both rivers are at a good medium flow right now. Not sure exactly what you are looking for but all three runs are raftable, the SF is a little longer and has a few more rapids but would be a long day. NF Goodyear's bar run is really fun in a raft and has Maytag, a fun, straight forward class V that is easily raftable (easy portage too) and leaves you pretty stoked. The rest of that run is class III-IV and has an easy straight forward shuttle. The runs are all similar for me in the fact that there are fun rapids with a bit too much down time in between each rapid, I always find myself thinking "ok, where is the next rapid". So if you want fun rapids with some mellow down time in between with great scenery, go get it.
Also check dreamflows, they have good links to write-ups from there. hope that helps.