It's been couple of months since Taiwanese smartphone maker HTC and Finnish phone manufacturer Nokia debuted their latest offerings - One X and Lumia 900 in the market.

While HTC One X is an LTE device featuring the latest version of Android, Ice Cream Sandwich 4.0, Nokia Lumia 900 is a Windows 7.5-powered smartphone. So they both are on totally different concepts, logically attracting different set of consumers. However, a first time buyer, who has neither experienced an Android phone or a Windows phones, or anyone who would like to replace their existing smartphone with a new upgrade could be torn between the two.

Therefore, if you are looking for a phone upgrade and are going through tough time to decide which smartphone to buy - HTC One X or Nokia Lumia 900, we're here to help. Here is a spec-to-spec comparison of both the powerful smartphones. Take a look at the features to decide and do share your opinion in the comments section below.

Form Factor

The Lumia 900 sports rounded edges and flat top and bottom look, has a vivid display of 4.3-inches Clear Black AMOLED with 480 x 800 pixels of resolution. On the other end, HTC One X features 4.7-inch Super IPS LCD2 touchscreen with 720p resolution. HTC One X has a candybar form factor and outguns Lumia 900 in screen comparison test as it has superior screen with pixels density of 312ppi as compared to Lumia's screen with 217ppi pixel density. Both the phones come backed by Corning Gorilla Glass protection.

Further, Nokia's latest handset has have dimensions of around 127.8 x 68.5 x 11.5mm with a weight of 160 grams, while HTC One X figures dimensions of around 134.4 x 69.9 x 9.3 mm and weighs about 130 grams. In other words, HTC One X is bigger but thinner and lighter.

Camera

Lumia 900 packs the same 8-megapixel primary camera as Lumia 800, complete with a Carl Zeiss lens at 3264 x 2448 pixels of resolution including features like autofocus, geo-tagging, dual LED flash and 720p video capture. Lumia 900 features the addition of a 1-megapixel rear facing camera, from its predecessor.

One X gives a head to head competition with its 8-megapixel camera and LED flash support. It records 1080p videos at 30fps with stereo sound recording. Further, it scores high with its VGA 1.3-megapixel camera in the device that is capable of recording 720p videos.

Processor and RAM

HTC One X is known for its quad-core 1.5 GHz Tegra 3 processor globally. It has 1GB of RAM and 16/32GB of internal storage. Surprisingly, there is no expandable memory option in One X. Also, the U.S version of One X is dual-core only, based on Qualcomm Snapdragon chipset.

Turning to Nokia Lumia 900, it sports the regular 1.4 GHz Scorpion processor. It has 512MB of RAM and 16GB of internal storage. Unfortunately, Lumia 900, like HTC One X, lacks microSD card slot.

Operating System

This is the most prevalent and the hottest difference between the two smartphones. HTC One X runs the latest Android OS version 4.0 dubbed Ice Cream Sandwich (ICS), topped by HTC Sense UI version 4.0. Additionally, HTC offers 25GB of Dropbox storage free for 2 years, Beats Audio integration and enhanced video and photo capabilities.

On the other hand, Nokia Lumia 900 comes amred with the Windows Phone 7.5 Mango, which boasts features like dynamic Live Tile Information, Twitter and LinkedIn integration in the People hub, Facebook-events integrated calendar, threaded email conversations support, visual voicemail, Outlook tasks support and much more. Other features of the OS include Shazam-like audio recognition, turn-by-turn Bing Maps navigation with voice guidance, Skydrive and Office 365 documents synchronization with PDF support, Microsoft Lync support, animated picture tiles, People/Groups gallery with Skydrive and Facebook sync, People Hub-integrated photo management, Zune SmartDJ multimedia mix support, video aspect ratio control capability while playback and more.

Furthermore, Nokia Lumia 900 will be soon getting an update of Windows Phone 7.8, which is due to be released for Nokia's flagship smartphone, after the launch of Window Phone 8 OS by Microsoft.

Windows Phone 7.8 will bring the Windows Phone 8 user-interface to Nokia's smartphone. Basically, that means the users will get a new "home-screen" which will support new Live-Tile sizes (small-medium or large). It will also offer the users to customize the tiles on the home-screen and maximise the size of the most important ones.

Wi-Fi, Bluetooth, WLan

In connectivity segment, HTC One X features Wi-Fi with DLNA sharing and hotspot functionality, Bluetooth version 4.0, NFC, assisted GPS and microUSB version 2.0 with MHL support. There is no FM Radio support in One X.

Nokia Lumia 900 sports an 802.11 a/b/g/n Wi-Fi connection and has 2.1+A2DP Bluetooth.

Battery Life

HTC One X is powered by Li-ion 1800mAh battery delivering talk time for more than 8 hours. In comparison, the Nokia Lumia N900 has a standard Li-lon 1800 mAh battery with up to 300 hours of stand-by, 7 hours of talk time and 60 hours of music play.

Price

The HTC One X is available for Android fans on AT&T at $199.99. As far as Lumia 900 pricing is concerned, the same carrier is offering the handset at $99.99. Both are available with a two-year contract.