Australia racked up 259-7 in their 50 overs before dismissing the West Indies for 145 to seal a sixth ICC Women's World Cup title in Mumbai.
And Guha, who helped England win the same crown four years ago, said whilst key players in the Australia side stood up and delivered, West Indies were far from their best.
"In a world cup final there's two ways you can go: you can rise to the big occasion or you can buckle under the pressure," said Guha.
"Australia, with all their experience of playing in World Cup finals in the past, stood up today. The West Indies needed Deandra Dottin and Stefanie Taylor to fire and, although Dottin gave us a glimpse of what she's capable of, Australia produced a far better all-round performance.
"Australia were extremely clinical in the field, backing up what was a good batting performance. There was a little stutter in the middle of their innings but Jodie Fields and Elysse Perry came to the rescue and got them up to a good total in the end."
Former England batsman Claire Taylor agreed the Australian side were deserved winners and pointed to the pressure they applied in the field as a key component of their victory.
"The Aussies were better in all departments," she said.
"The Australians put on so much pressure when they field so well and dive on everything. Compare that to the West Indies, who let the pressure off when the Aussies were batting and dropped a few catches as well.
"You can probably look at the Aussies' innings and say they scored another 20-30 runs more than they should have done and then the West Indies batsmen had to take risks and hit out."
Meanwhile, Guha - who averaged less than 23 with the ball in ODIs for England - was critical of the West Indies attack, which she believes failed to hit their straps.
"Shaquana Quintyne was the only person who created pressure for the West Indies when they were bowling," she said.
"Other than that their bowling was quite ill-disciplined - there were a few wayward deliveries. We saw Tremayne Smartt at the beginning of their innings and she was nothing like the bowler she was against New Zealand, when she was getting it in good areas on a consistent basis.
"That took a lot of pressure off the Aussie batsmen, they didn't need to take risks, they just had to wait for the bad ball - and they capitalised on that."