IMHO Autopano Pro hasn't really kept up all that well, at least not with the features I want. The few times I tried the HDR stuff it was pretty awful. I either generate separate layers for each exposure, or use the Enfuse blending in PTGui. PTGui also has more projection modes now, including Vedutismo, which I'm finding I really like for a lot of my wide to medium-wide landscape panos. AutoPano Pro still tends to do a better job of automatically leveling the pano and finding the center point, and is more convenient to use; but the enfuse blending and new projections in PTGui make Autopano Pro less attractive to me now.