I haven't seen either of these, but I'll try to check them out on my ride this morning.
As a cyclist, and pedestrian, I prefer raised crosswalks to both bump outs and center islands. I also kinda think that bump outs and center islands don't slow cars as much as raised crosswalks and speed bumps do, and can lead to some weird driving behaviors, like motorists passing cyclists in the opposing lane with an island, as Zack, Emma Scudder & I once experienced on Ludlow Street.
I find it exceedingly unpleasant and dangerous when a bike lane disappears into the hard curb of a bump out, forcing bicyclists to merge with motorist traffic, or when a refuge island causes motorists to merge with a bike lane, while a speed bump seems to slow cars a lot more and, at least for me, might cause me to slow down a little (a good thing) but doesn't present much of a hazard at all. As a Pedestrian, I just feel like the real slowdown cars do to a raised crosswalk (if it's raised enough) makes them a lot more likely to bother stopping than either of the other treatments.
I think this illustrates the inherent weakness PBPAC has; we generally comment on changes like this after they're made, when it's expensive and difficult to change them...