Similar character animations and framing for both games are shown in the video. Both Call of Duty games were developed by Infinity Ward.
An Activision representative was not immediately available to comment.
Activision announced this morning that Call of Duty: Ghosts generated $1 billion at retail in 24 hours, though that figure includes units sold to retailers, not necessarily consumers.
For more on Call of Duty: Ghosts, check out GameSpot's review.