NUS bluetooth data rate

Dear Teao of Nordic,

which is Bluetooth data rate of NUS example ind case 1 and case 2? Is it dependant of Softdevice Version? Can data rate be configured?

Is it 1Mbit per Default? which means Bluetooth 4.x?

case 1:

using nRF5_SDK_12.3.0_d7731ad


case 2:

using nRF5_SDK_15.0.0_a53641a


thank you....