Sony's PlayStation 4 has been regularly outselling the Xbox One, but Microsoft's current-generation console is now "building momentum," according to new comments from Microsoft CFO Amy Hood.

Speaking during Microsoft's latest earnings presentation, Hood said Xbox's strong performance during the last quarter, along with positive buzz at E3, is helping the Xbox One pick up steam.

"This progress, as well as the excitement we generated at E3--with Xbox exclusive gaming content and backwards compatibility--demonstrates the building momentum that exists within the Xbox ecosystem," she said.

Although the PS4 was the top-selling overall console in the United States during June, the Xbox One outsold Sony's console during the week of E3. Xbox One sales during E3 week rose 79 percent year-on-year, which, as Hood said, could be attributed to excitement over Xbox One backwards compatibility.

As far as exclusive games, Microsoft has time and again claimed that it has the "greatest holiday games lineup in Xbox history." Some of company's big exclusive games this year include Halo 5: Guardians, Rise of the Tomb Raider, Forza Motorsport 6, Gears of War: Ultimate Edition, Rare Replay, and Fable Legends.

For its part, Sony has openly admitted that its first-party PS4 lineup this year is "a little sparse."

For the quarter ended June 30, combined Xbox One and Xbox 360 sales increased compared to last year, while Microsoft made more money from Xbox Live than it did the year prior. On top of that, first-party game revenue was on the up, thanks in part to the continued success of Minecraft.

Check out this post for a full recap of Microsoft's Xbox performance.