Ability to use TinyGPs and Arduino Mini Pro

Using Arduino Project Guidance
7

Then this should work...

void setup() {
  Serial.begin(57600);     // gps TX,RX on 0,1
}

void loop() {
  if (Serial.available()) {
    Serial.print(Serial.read());
  }
}

except that it doesn't. If I hold in the reset button -- so that presumably the microcontroller isn't doing anything -- then I see the NMEA messages come out. As soon as I release the reset button then nothing is printed anymore, except sometimes I see one more sentence.

However, the following code does work,

#include <SoftwareSerial.h>
SoftwareSerial gps(3, 2);   // gps TX,RX on 2,3

void setup() {
  Serial.begin(57600);      // serial monitor
  gps.begin(57600);         // serial to GPS
  }

void loop() {
  gps.listen();             // doesn't seem to matter if this is here or not
  if (gps.available()) Serial.print((char)gps.read());
  if (Serial.available()) gps.print((char)Serial.read());
  }