The two-time A-League champion turned on a master class to destroy Victory on its home turf and send a clear message that it was raging hot favourite to take out the premiership.
Broich, who played a key role in Brisbane's dazzling display, said it was easily Brisbane's best performance of the season.
"We played very well after the break but the first half was pretty good already although it was more of a contest," Broich said after training in preparation for the home game against Adelaide United on Saturday.
"We had many scoring chances in the first half too.
"I have watched Victory play several times this season and they have outplayed pretty much every opponent.
"So winning so convincingly down there was an achievement and comparable to whatever we have done in the past.
"But it's a different ball game now and it's hard to compare the current team with the one that won two championships in 2011 and 2012.
"I don't like to compare the two teams. We had a fantastic side back then but nowadays it is much harder to break teams down."
Broich, who will be 33 this month, said he had high hopes that 2014 will bring good tidings to his team that is leading the competition with a seven-point margin over Western Sydney Wanderers after 13 rounds.
"We certainly have the potential to win the premiership because we have had a great pre-season," he said.
"The new boys have settled in well and I'm not actually surprised at how well we're playing and that we're having such a great season."
Broich has played a key role in Brisbane's resurgence.
The German marquee was not at his best last season but this year his game is reminiscent of the days when he used to torment defenders with his complete mastery of the ball.
Broich said he has a simple explanation for his and his teammates' revival.
"Last season we were struggling as a football team," he said.
"In the past the Brisbane team used to work like clockwork and our system made everybody look good.
"We certainly lost that last season and individually we all suffered.
"But this season we have turned it around collectively and we have become strong again.
"We are a team again now and it is so easy for everyone to look good now.
"From an individual perspective there has not been one player in the team who had a bad game in the last few weeks.
"That's the basis of a good system."
The playing system Broich refers to is the midfield diamond that has given Brisbane an edge all season.
Brisbane played in a very basic 4-3-3 formation for two seasons under Ange Postecoglou while Rado Vidosic tinkered with two holding midfielders at the start of last season before he was replaced by Mike Mulvey.
This season Luke Brattan is the holding midfielder, Matt McKay and Liam Miller are the middle two and Broich is the man at the top.
"There are many players involved in our build-up these days," Broich explained.
"Luke is usually the guy who starts all our attacks because he is the one who finds the little pockets.
"Matty has a massive engine and is moving all the time and is always available.
"Liam is doing very well for us in his first season.
"It's really a diamond at the moment with other mobile players available in tight areas.
"Our current style is definitely different to the one we had under Ange.
"We still like to use the flanks but we tend to go through the middle more these days because we have the quality to do so.
"This formation gives us more flexibility."