Apple iPhone 6S, 6S Plus
The new iPhone models are now available for pre-orders in the UK Getty Images

One significant upgrade among others in Apple's new iPhone series is an extra GB of RAM. As the teardown by iFixit reveals, the new iPhone duos packs Samsung's 2GB LPDDR4 RAM that works in conjunction with Apple's A9 system-on-chip.

The iPhone 6s and 6s Plus were not the first iOS devices to use a 2GB RAM. Apple introduced this change starting with the iPad Air 2, which was released in October 2014, by adding another gigabyte of RAM. This helped the Safari and other RAM hungry apps function properly. Having an extra GB of RAM produced some very noticeable results. If you are curious to know the productivity on iPhone 6s and its large-screen sibling, here is some good news.

Like the iPad Air 2, the iPhone 6s and 6s Plus benefit from this addition considerably, claims iDownlodblog. The website has also posted a video showing the performance comparison between 2014's iPhone 6 and iPhone 6s.

There are various advantages of having a 2GB RAM but one notable benefit is to do with the Safari browser. The video shows two iPhone editions placed side-by-side with a number of websites, including ones with high graphic content, opened on both. Unlike the iPhone 6, which takes time to load web pages, and needs you to keep refreshing the browser, the sites on iPhone 6s open up quickly as soon as you tap on them.

While there are other improvements, the 2GB RAM is also an important factor that needs to be considered when it comes to performance, if you are looking to upgrade from an older model. In case you are sceptical, check out the video comparison for more details.