Okay well might be best to ask in the FFB threads on what are the best settings for that wheel. The custom FFB lets you modify the relative strength of the effects as well, in case you are missing something specific. The reality is that AC and AMS2 have very different tyre models and somewhat different FFB philosophies, so they're never gonna feel very similar if that is what you're after. Maybe try the McLaren F1 GTR, it has probably the sharpest turn-in response and good sensation of connection with the road. If you can get the FFB to feel good for that car, many others might follow.