For more on problems for impartiality, including involving infinite populations, and a comparison of some different utilitarian-ish views and how well-behaved they are (especially 45:40 for a table summary), see
https://globalprioritiesinstitute.org/parfit-memorial-lecture-jeffrey-sanford-russell-problems-for-impartiality/
Handout here.
For more on problems for impartiality, including involving infinite populations, and a comparison of some different utilitarian-ish views and how well-behaved they are (especially 45:40 for a table summary), see
https://globalprioritiesinstitute.org/parfit-memorial-lecture-jeffrey-sanford-russell-problems-for-impartiality/
Handout here.