After searching I wasn't able to find anything comparing these two. I'm looking to get some more grit out of my rig along with a bit more control over my mids, having just switched from an Eden Nav. preamp to a DB750. I'm using an EBS Valvedrive as an always-on, tube pre right now, but can easily start using that as my main overdrive pedal, as it only offers a mid cut. I have both an extra rack space and room on my pedalboard and am toying with the idea of picking up either one of these Aggie units. I know the TH is based on the OBP-3, so it will give me more control over the midrange but that agro looks tempting! Anyone compared the two?