BA released updated scouting reports on the two guys:
Sulbaran isn't a typical 30th-round pick, as he signed for $500,000 out of high school in 2008 and pitched for the Dutch national team at the World Baseball Classic before making his pro debut in 2009. He had some of the best pure stuff in the Reds system, showing a fastball that features good sink at times and runs up to 95 mph at others and flashing a plus curveball and changeup. Sulbaran has some crossfire in his delivery and struggles to maintain the consistency of his pitches and his command. But he's still just 22, and if he figures it all out, he could be a No. 3 starter down the road.
Like the girl with the curl, when Joseph is good, he's been very good. But when he's been bad, he's been very bad. This has been a good year for Joseph, as he rediscovered the feel for his slider by stopping a tendency to fly open too soon in his delivery. He has two plus pitches: a 92-95 mph fastball and a slider. He will likely never have plus command because his delivery features significant effort including a head-whip, but his stuff is good enough that if he has even average control, he should be able to get big league hitters out. At worst Joseph should be a useful lefty reliever, but his stuff is good enough to get righthanders out as well. He profiles as a solid set-up man.
The current reports paint a little different picture than the outdated info Tim posted.