We’d really appreciate the opportunity to do a real comparison. In this post, they are comparing a campaign without Facebook Exchange (AdRoll) to a campaign with Facebook Exchange access and using two different definitions for conversions.
It’s a little odd that FBX wasn't included with the AdRoll campaign since unlike PerfectAudience, AdRoll is actually is one of few PMDs that have a seat on FBX ( http://www.facebook-pmdcenter.com/fbx ) and has the most clients running FBX campaigns of any FBX PMD.
PerfectAudience’s CPCs and CPMs are likely lower because Facebook retargeting is cheaper in this regard, and if they ran an AdRoll FBX would likely be comparable.
Also looking at your charts, they never setup conversion tracking in AdRoll. Without this they are comparing (PerfectAudience) view through conversion CPA to last touch Google analytics click through conversion CPA. To analytics and online marketing expert, it should be obvious this is not a fair comparison.
A lot of the UI callouts are valid and AdRoll is working on new features and launching a new dashboard very shortly. If anyone wants to setup a real test and do real analysis of performance, we’d be happy to help.
I suppose view-through conversion might be clicking on ad, user goes to site, completes purchase and then some kind of callback gets fired. On the other hand, Google analytics one would be user completes purchase, GA looks at which referrer came last and registers that as the source of conversion?
Google Analytics conversions are last touch click through conversions, where all marketing touches compete and the last that occured gets 100% of the credit.
The ubiquity of Google Analytics and thus, ubiquity of "last touch" conversion tracking, has really helped Google make the case for Adwords. If someone sees an ad from a display advertising company, retarteted or otherwise, it's not uncommon for them to head to Google to look up more information about that product or service. If they then sign up or convert, the advertiser will see Google analytics listed as the sole source of the conversion. This is great for Google and less great for everyone else higher up in the funnel.