AI Too Fast Or Am I Doing Something Wrong Here?

So I recently pit a Lamborghini Huracan ST vs the Huracan GT3 on 80% difficulty, 5% variation and 65% aggression around 5 laps of the Red Bull Ring GP. In the Huracan ST, I was around 2 whole seconds slower than the GT3, making the gap at the end around 10 seconds. Then I used the Merc AMG GT3 which I'm more familiar with and with a good setup, still 1.5 seconds slower than the Huracan GT3 on 80% difficulty. What am I missing here? Also, is it just me or does increasing the aggression sort...

AI Too Fast Or Am I Doing Something Wrong Here?