if문에서 있잖아

코드1                                  코드2
if (score >=90 )                    if (score < 60)
printf (\"A\");                            printf(\"F\");
else if (score >= 80)           else if (score < 70)
printf(\"B\");                             printf(\"D\");
else if(score >= 70)            else if (score < 80)
printf(\"C\");                             printf(\"C\");
else if(score >= 60)            else if (score < 90)
printf(\"D\")                              printf(\"B\");
else                                       else
printf(\"F\");                             printf(\"A\");


코드1 이랑 코드2랑 똑같다고 보면 되지??
내가 보기엔 똑같은데 혹시 예상 외의경우 다르게 나올까봐 걱정임