Harald,
The SL8 design is significantly different to the Q26 one, the 2G units had their firmware/hardware tightly integrated and as a result there was not a lot between the OS/API and the hardware. On the HL8 Open AT had to be integrated on the Qualcomm platform in a similar way to Android is in that it is a ‘guest OS’, there is/was no other way to do it hence there is a lot of firmware/process between the application/API and the actual hardware so while the processor is far higher spec the overall performance is about the same but things like debounce cannot be handled/catered for, we are also limited by the platform capabilities.
Regards
Matt