PnP configuring will be explained later. What is actually set in the hardware. They both should be the same. If they're not it spells trouble since the driver has incorrect info on the physical serial port. If it has the wrong IRQ the driver will not get interrupt service requests from the serial port, resulting in a very slow or no response.
Text appears on the screen slowly after long delays''.
If it has the wrong model of UART there is also apt to be trouble. To determine if both I0-IRQ pairs are identical you must find out how they are set in both the driver and the hardware. This is easy to find out. If everything works OK then what it tells you is likely also set in the hardware. Be warned that there is no guarantee that the same is set in the hardware.