Both the Motorola X and the Samsung Galaxy S4 are quite popular on the web and have been making some rounds on the internet more than any other rumored Android smartphone. Both the devices have built quite a reputation for themselves in the last few months, and now it’s believed that both the devices could also turn out to be the most influential among all in Android in 2013.

This piece of information is now also relevant to a new The Wall Street Journal report. The report reveals that Google is undeniably worried about Samsung’s augmented role in the Android ecosystem. This goes without saying that the South Korean company is currently the primary Android smartphone and tablet maker as far as market share and profits are concerned.

“Google executives worry that Samsung has become so big—the South Korean company sells about 40% of the gadgets that use Google's Android software—that it could flex its muscle to renegotiate their arrangement and eat into Google's lucrative mobile-ad business, people familiar with the matter said,” WSJ writes.

The fact that Samsung’s remarkable lead could become a problem for Google at some point in the future has been speculated a number of times in the past. Moreover, an official study has also shown that customers could already be confusing “Android” with “Galaxy,” with the being the strongest and the most known Android-based device in the market.

“At the same time, Samsung is a great ally in the Android vs Apple war, one that Google can’t really afford to lose, so the Google-Samsung relationship is definitely one to follow in the coming months, especially if the latter is unhappy,” Android Authority states.

WSJ, as expected, seems to have spoken with people familiar with the matter, who, although unnamed, are able to comment on this particular business relationship. According to them, Google executives are worried without a doubt about Samsung’s influence in the Android ecosystem and what the massive corporation could do in the future, as its market share keeps on increasing.

“Google executives are worried that Samsung could extract financial or other concessions if it gains more leverage, people with direct knowledge of the matter said.”

On the other hand: “At a Google event last fall for its executives, Android head Andy Rubin praised Samsung’s success and said the partnership had been mutually beneficial, a person familiar with the meeting said.”

The Galaxy S4 is said to arrive with a 4.99-inch Full-HD SoLux Display, Snapdragon 600 1.9 Ghz processor, 2 GB of RAM, 16, 32 or 64 GB of internal memory with external said to support up to 64 GB, 13-megapixel primary camera, and a removable battery, running Android Jelly Bean.

The Motorola X, on the other hand, is believed to sport the upcoming Android 5.0 Key Lime Pie - making it the debut handset, a 5-inch edge-to-edge 1080p screen (similar to that on the Motorola RAZR M), and an eight-core processor. Not much is known about the X smartphone as of now.

The Motorola X has already been spotted in various rumors and leaks so far around the web, although it is still awaiting an actual confirmation. However, there is a mention of it in the WSJ report.

“Meanwhile, Google’s Motorola has been developing what it calls the X Phone to compete with Apple’s iPhone and Samsung’s Galaxy S devices, people with knowledge of the initiative have said.”

Either Samsung will again take away the Android Market in 2013, or maybe this time around Google will rise to take its place. Irrespective of the competition, it seems like Android fans are actually set for a good year altogether.