MIAMI -- In his presidential campaign kickoff speech Monday, Sen. Marco Rubio (R-Fla.) used language reminiscent of another big speech from over a decade ago that catapulted President Obama -- then a state senator -- onto the national stage.

Here's Rubio:

"I know my candidacy might seem improbable to some watching from abroad. After all, in many countries, the highest office in the land is reserved for the rich and powerful. But I live in an exceptional country. ... where even the son of a bartender and a maid can have the same dreams and the same future as those who come from power."

And here's Obama giving the keynote address at the 2004 Democratic National Convention:

"Let me express my deepest gratitude for the privilege of addressing this convention. Tonight is a particular honor for me, because, let's face it: My presence on this stage is pretty unlikely. ... My parents shared not only an improbable love, they shared an abiding faith in the possibilities of this nation."

This isn't the first time a comparison has been drawn between Rubio and Obama. As many people have noted, both decided to run for president as relatively new senators at a relatively young age.

Of course policy-wise, they are very different. Rubio staunchly opposes some of Obama's signature achievements, like his federal health-care law. The Republican is also a sharp critic of Obama's foreign policy toward Cuba and Iran.

The list of differences goes on and on. And Rubio himself has rejected the comparison to the president.

"I think they’ll also hopefully look for someone who has more of a track record than just a handful of years as a backbencher in the state legislature followed by a handful of years in the Senate, not having, not really doing anything serious about any major issues," Rubio told Hugh Hewitt in February. "As I look at my own considerations, I’m reminded that I served nine years in the Florida legislature, the third-largest state in the country. I was its presiding officer for two years, and also ran the Florida House from an administrative point of view ...."

But it's worth noting that stylistically, Rubio is using a version of the rhetoric Obama used. It is rhetoric that is both optimistic about America and seeks to send a message to voters that he is not just like every other Republican.