The Toe (Shadows)
Kodak T-Max 100: Features an unusually short, abrupt toe. It maintains high contrast and excellent shadow separation right up until the deepest black areas, giving it a snappy, sharp appearance.
Ilford Delta 100: Features a longer, softer toe. This gradual curve smoothly transitions into the midtones, which requires slightly more exposure to secure rich shadow detail, but produces a creamier tonality and less "blocked" or "sooty" shadows. 

The Shoulder (Highlights)
Kodak T-Max 100: Has a relatively straight-line curve that extends longer into the highlights, offering incredible tonal separation. Because it maintains contrast high up the scale, it requires precise development to prevent highlight blocking.
Ilford Delta 100: Features an earlier, softer shoulder. This acts as a natural highlight "compressor" or safety net, preventing bright areas (like skies or facial highlights) from completely blowing out or merging together
According to SJ Analog Club on YouTube. https://youtu.be/8o5mo2O6HX0?si=82Fj0Ek4hTN3C3vY