[Python] What's the difference between get_user_model() and importing CustomUser model...

This is my views.py in a API server running Django REST framework.

from rest_framework import generics

from users.models import CustomUser
from .serializers import CustomUserSerializer


class APIView(generics.ListAPIView):
queryset = CustomUser.objects.all()
serializer_class = CustomUserSerializer


This code works fine. However, when I google around, I discovered that the recommended way is to use get_user_model().

So, the proper views.py should look like this;

from rest_framework import generics

from django.contrib.auth import get_user_model
from .serializers import CustomUserSerializer


class APIView(generics.ListAPIView):
queryset = get_user_model().objects.all()
serializer_class = CustomUserSerializer


I tested and both code worked as I wanted. What is the difference between the 2 code? Is get_user_model() really better?

I am using django v4, python 3.9, django rest framework.

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