Lance Franklin's manager says Sydney's greater potential to play finals was a key reason his client will join the Swans rather than the Giants.
Franklin will leave Hawthorn and sign a nine-year deal with the Swans worth a reported $10 million once AFL trade week commences on Friday.
It was thought Franklin was headed to the Giants until they announced they had withdrawn a multi-million dollar offer on Tuesday when they were informed of his intention to join the Swans.
Franklin's manager Liam Pickering says the two-time premiership player feels linking with the Swans will give him a better chance of playing finals again.
"He wants to play in finals ... the Giants are going to be a really good team, but it's going to be a harder build," he told the AFL website.
"The Swans, when their stadium is finished, they're going to play in front of full houses every week, which he's used to.
"So in the end there's two teams in Sydney and he had to play with one of them if he wanted to leave Melbourne and he ended up wanting to play with the Swans."
Pickering admits he spoke to the Swans about Franklin leaving the Hawks after the 2012 season prior to beginning talks with the Giants.
He says the Swans sent through an offer in mid-September but supports Franklin's insistence that he did not make a decision until after the Hawks won the grand final last Saturday.
"His focus was purely on playing for the Hawks and trying to win a flag," he said.
"So as soon as the grand final was over I asked the question 'has anything changed?'
"He said 'no, I want to go and live in Sydney', so that was pretty much where it was at."
Pickering says Franklin's decision to leave the Hawks began to take shape in August last year following the media coverage the key forward received when he was involved in a car accident.
"He (Franklin) had the media popped outside his house for a week or two and then sort of got people dropping off stuff to his doorstep," he said.
"He couldn't stay at his own home for probably a two or three week period. So at that stage it started to get a little bit on top of him.
"That was when initially I think he thought 'well, maybe the Melbourne bubble is not for me'."
The length of the Swans' offer has drawn speculation Franklin will not see out the end of the contract, in light of the fact he is 27.
But Pickering outlines that Franklin will need to complete the ninth and final year of the deal if he is to reap its financial rewards.
"It's a back-ended deal, that's what people don't understand," he said.
"The first couple of years he will be getting less money than he is at Hawthorn now. If he decides to retire after seven years or eight years he doesn't get the money."
Pickering says he does feel sorry for the Hawks and Giants to have lost out on the services of Franklin, but he maintains he was operating in the best interests of his client.