Hello,
I'm the Sales Manager for both ACDelco and Durofix tools in N. America, you are correct, we have some cross over with our products. For the most part, our general objective is to have the Durofix product focused on the contractor and the ACDelco line is focused on the professional mechanic.
Without going into to much detail I'll say we have been quietly manufacturing power tools for @ 30 years for most of the major brands, I'll bet you have a tool or more of ours already. We decided to do our own line and partnered with ACDelco.
As for the torque, all I can say is test it for yourself, no cordless tool will beat our ARI2023 or ARI2060 in torque, the ARI2061B pictured is a bit lower on torque but very compact and super lightweight, it will get into very tight spaces.
We are working as fast as possible to come out with professional tools for guys who make a living with their hands, we are less money because your not paying for our name. We have a great warranty...at least we think so.
Check out the reviews on YouTube, review our website and after you use our tools, if they are not what we said they were, both the pneumatic and cordless, return them for a refund...so far we have had very few returned.
Thanks!