I’m using an ESP32 to send UART data to a PC.

Is this:

uint16_t meas;
while(1){
 \ get meas data
 printf("%ur",meas);
}

any different from this:

uint16_t meas;
while(1){
 \ get meas data
 uart_write_bytes(EX_UART_NUM, (const char*) meas, meas.size); 
 char r = 'r';
 uart_write_bytes(EX_UART_NUM, (const char*) r, r.size);
}

i.e. does the PC receive a different amount of bits for each case? The latter uses the espidf driver/uart.h lib.

I expect both to be the same but am unsure how the printf function operates. I assume printf may send a bunch of extra characters for each digit?