The exponential growth is totally irrealistic because it doesn’t consider the environmental limits that have consequences on the population according to this model a population can grow with no limits.
The is more realistic because it considers those environmental limits that are density food abundanceresting place sickness parasites competition…. It tells us that the population has a limit because of those environmental factors.
For example if you study a rabbit population on a field without predators of course this population will reach a maximal nomber of individuals because of the lack of food the mixomatosis parasites intra and inter specific competition …
Hope it’s helpfull 🙂