The sensors may measure different locations or respond at different speeds. One number cannot be compared meaningfully without knowing the method and placement.
What the observation means
A food-core probe, pan-wall sensor and surface instrument are not interchangeable. Their approved uses and accuracy limits matter.
A useful next step
Follow the appliance's sensor instructions and appropriate food-safety checks. Do not calibrate the hob based on an improvised comparison or place a household device inside a hot pan. Implausible or inconsistent readings should stop reliance on the sensor mode pending advice.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.