The iPhone 7 and iPhone 7 Plus are now on sale, and customers are curious about just how powerful these new smartphones are. There is a video circulating online which shows how the iPhone 7 Plus compares to the iPhone 6s in terms of speed - and the results may just surprise you.

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The iPhone 7 Plus features the new A10 Fusion chip and a 64-bit quad-core processor; which uses two high-performance cores to perform heavy tasks and two cores that handle simpler ones.

The video shows how the iPhone 7 Plus stacks up against the iPhone 6s Plus in terms of opening apps, boot-up time and a Geekbench test. It appears that the iPhone 6s Plus boots faster by around eight seconds while the iPhone 7 Plus gets a slight edge in launching the App Store.

The iPhone 6s Plus opens the Camera faster while the Safari opens faster in the iPhone 7 Plus. The iPhone 6s Plus was slightly faster in rendering a second webpage. Meanwhile, the Geekbench test shows that the iPhone 7 Plus finishes faster with a score of 3,470 and 5,621 as opposed to its predecessor's 2,483 and 4,127.

"We've got great innovation in the pipeline. New iPhones that will incentivize you and other people [who] have iPhones today to upgrade to new iPhones," Tim Cook said in an interview. "We are going to give you things you can't live without that you just don't know you need today. That has always been the objective of Apple. To do things that really enrich people's lives. That you look back on and you wonder how did I live without this."

The iPhone 7 and iPhone 7 Plus are the first water-resistant iOS smartphones which come with touch sensitive home button.