Apple's iPhone 6 release date in 2014 will not be arriving until September but forecasts have been pouring in. According to Rosenblatt Securities Managing Director Brian Blair, Apple iPhone 6 may have the potential to kill Samsung once released. Likewise, another analyst from Morgan Stanley notes that if Apple releases a larger iPhone 6 then it can increase sales by as much as 30 percent. Can the iPhone 6 really deliver?

According to a report by Bloomberg, the iPhone 6 can gain better competitive element especially in regions like China and Asia. ZTE and Huawei are strong at the low end. Samsung counts as much as 70% of its sales from mobile phones. Bulk of their business comes from mobile. However, there are challenges to that.

According to Blair, Samsung is attacking all tiers of the market. They have high to low end phones. Apple is just focused on the high end of the market. The iPhone 5c and the previous models can be considered to be in the mid-section. While Apple and Samsung have very different approaches, the release of a larger iPhone 6 will really attack Samsung. The managing director also added that it can be interesting to see how things play out once Apple releases the iPhone 6.

Morgan Stanley analyst Katy Huberty, on the other hand, said that Apple may be able to increase iPhone production up to 66 million units in the next year if the company decides to go with a larger screen. That is compared to the 51 million units predicted with a similar size to the iPhone 5s. Huberty's analysis came from a survey of smartphone buyers stating that as much as 47 percent will be considering an iPhone purchase should the screen or display come in a bigger size.

Apple can convert users to a larger screen and compete even better with rivals like Samsung.

"Current iPhone owners value the software, brand, ability to synchronize to other Apple devices, and the App Store's quality and size more than the average user, which drives Apple's high loyalty rating," it was noted in the research.

"The top criteria across all brands are longer battery life, software / operating system, and lower price, though current Apple users think price is of lesser importance."