glad you asked a follow up. that was my intention hehe.
squash shot is a last ditch effort shot. used when that's the only way you can get the racquet on the ball. totally stretched out. no other shot is possible. or can be used when you are a little bit lazy or winded from being pulled on a string for a few shots.
running forehand is used when on a dead run and you have time to hit an aggressive shot either 3/4 angle or dtl. you have time to transfer weight into the shot maybe some angular momentum etc.
running forehands can be very powerful.
they are different situations. if you are using a squash shot when you could be using a running fh then you are lazy, winded, have poor footwork or need more understanding of the game.
Yonex VCore 100s - SW 351 6pts HL
Tour Bite / Luxilon 4G 16 @ 51lbs