The Samsung Galaxy S IV might be the most anticipated new smartphone of the year and LG does not want to run into a juggernaut. As it turns out, Samsung is rumored to be moving forward the date of the introduction of the Samsung Galaxy S IV by one week to March 15th. That will be followed by a launch in Europe during April with the U.S. Africa and Australia rumored to launch the phone in May or June. Launching the LG Optimus G Pro in February would give LG plenty of time to grab buyers for the device before they are snagged away by Samsung.
The LG Optimus G Pro is actually two phones, a 5 inch model for Japan and a 5.5 inch model elsewhere, both with an FHD display. And while some might think that LG isn't confident enough about the model that it needs to have as many days possible free of competition from Samsung, the truth is that this is a cutthroat business right now where every extra dime of profit is hard fought for.
source: KBench (translated) via AndroidAuthority