It would really depend on the other network devices you are connecting to but I'd say that 99% of the time there will be to little difference to notice.
I myself would take the intel over a realtek but if that card is working fine for you there is no reason to change it.
You are about to answer a thread that has been inactive for more than 6 months. If you still wish to proceed, please ensure that your posting is original and does not duplicate or overlap any prior responses to this thread.