The Premier League leaders came from behind to triumph at St Mary's in the fourth round of the FA Cup on Saturday evening.
Owen's first goal since September after 65 minutes cancelled out Richard Chaplow's first-half equaliser before Javier Hernandez ghosted in to wrap up the tie with quarter of an hour remaining at St Mary's.
"They played well - they're flying high in their division," Owen said on ITV1.
"In the FA Cup, no matter what standard you're playing against it's always really tough for the first 45 minutes, an hour.
"Then, inevitably, the better quality... obviously they've got to run more to keep up with us. Then they tire and it's often the way that the better teams come good in the last half-hour.
"We played in the Carling Cup earlier in the season against Scunthorpe away and it was similar. They went a goal ahead and it was only in the last half an hour that we ran away with it."