Surestimé vs. surfait

In the French language, words like 'surestimé' and 'surfait' both suggest the idea of exaggeration in evaluation, but they are used in slightly different contexts.

Surestimé

'Surestimé' refers to something or someone that is valued or appreciated more highly than is warranted. It implies an overestimation of qualities or value, often based on subjective opinions or insufficient facts.
Ce joueur est surestimé par les médias.
(This player is overrated by the media.)
Selon moi, les vertus de ce régime sont largement surestimées.
(In my opinion, the virtues of this diet are largely overestimated.)

Surfait

'Surfait' describes something as overrated in a stronger, more pejorative sense. It suggests that the thing or person is not only overrated, but that it does not live up to the hype or expectations created around it. This word often carries an undertone of disappointment.
Ce film est vraiment surfait, je m'attendais à mieux.
(This movie is really overrated, I was expecting better.)
Beaucoup trouvent ce restaurant surfait après y avoir dîné.
(Many find this restaurant overrated after dining there.)

Summary

'Surestimé' and 'surfait' both deal with overestimation, but differ in their intensity and implication. Surestimé' is generally used for things or people that are thought to be valued more highly than they should be, while 'surfait' suggests a significant discrepancy between expectation and reality, often leading to disappointment.