hi I have a golf 1.8t gti I am still quit new to this car so i am learning and I have just discovered I have the aum engine which has the ko3s turbo which im hearing is the better turbo but the agu engines are better internally?

atm I am running at about 195-200 bhp and just had a clutch upgrade as my remap was to aggressive for my standard clutch but does anyone know what the aums can internally handle bhp wise so i know my limit i can go to any info is appreciated as i said new to this car and turbo's
Thanks