Chesscademy exercise: material part 2 - why doesn't this move result in a 2 point material lead?
f3 x e5 - Knight takes Pawn - does give you a 1 point advantage on your turn. However black can retaliate with c6 x e5 taking your knight without fear of any retribution which resets the advantage in black's favour. Interestingly note that this move also defends against c4 x f7 which also results in a positional advantage to black.

c4 x f7 - Bishop takes Pawn - gives you a 1 point advantage as well but crucially results in a check. Black cannot retaliate with e8 x f7 since that would result with check from your queen on b3. Interestingly this is also a check; you are forcing black to move his King thus preventing him from developing any defence/offence for this turn.

It is important to consider how the material advantage will change on your opponent's turn as well as your turn when making your move.

As Pieter Geerkens stated the key difference is the guaranteed loss. Theoretically you could lose a 3 point piece from c4 x f7 (i.e. the Bishop), however your loss is not guaranteed in the next turn and any attempts to threaten the Bishop with another piece allows you to respond before the Bishop is taken.