I have followed all the posts on your build with anticipation, but I'm thinking that since these weren't done at the same temps they are likely suspect. I asked quite a few questions about the FenFab setup in the thread because I wondered if the intake had been directed to some alternate source of high flow outside air . But, given that it's using the factory snorkus, I'm not sure why the IATs would be lower. I might imagine since the intake is aluminum rather than thermoplastic, I might see some type of difference related to thermal mass on your pulls. So, I'd have to believe that the easiest explanation is simply different days, different temps. If the pressure drop were less from atmosphere to intake, it would add HP, (and I doubt that this is measurable in the logs) but I'm not seeing how the IATs in this scenario would be affected appreciably.
I'm not flaming you, just not sure those log numbers are meaningful.