I will try my best to make this simple.
The reason Mobil 1 T&SUV oil does not say CI4+ is because it does not have to. This oil is targeted at the T&SUV consumer market. It is not targeted for the 18 wheeler with the 425 H.P. Cat in it. It is priced less than Mobil Delvac 1 5W40.
If Mobil told the over the road trucker that this product was the same as Delvac 1 5W40, they would never sell any more Delvac 1. Then they would loose the huge profits they are making off of it. It's called marketing.
Now this is just my opinion, but I am not convinced that Mobil 1 T&SUV and Delvac 1 5W40 is the exact oil.
One more thing on your Audi, somewhere in your owners manual where it is saying to use all these special oils A3 etc, does it say somewhere API SL? I bet if it does, the the wording is use an oil with one of the following specs.
The Mobil 1 T&SUV will be an EXCELLENT oil for your Audi.