All I know is my 2008 STi with Dom1.5 pulls significantly harder than my 2011 WRX with VF52. I still have both in my garage, so I can drive them back to back and the STi is definitely faster.
One thing I would suggest is using flat-foot shifting. I can tell a pretty significant pause in boost if I shift normally vs flat-foot shifting. FFS almost makes it feel like I didn't even shift at all, continuous acceleration.