10-core does the heavy lifting 

Xiaomi is a company that sold over 41.5 million phones in China and the number is even higher when you add markets like, India and the Rest of the World. The company is well known for its mix of MediaTek Helio and Snapdragon products and usually offers the best price performance ratio. 

Addition to Helio X20 and X25

MediaTek has announced two more Helio X20 series products - a Helio X27 and an X23 and as you can figure out from the names, Helio X27 is faster than the X25 while X23 is a bit slower. 

Saves up to 30 to 48 percent of power vs two-cluster X10

MediaTek is relatively young company when it comes to smartphone SoCs. They started making System on Chip (SoC) for feature phones and smartphones years ago, and they grew from zero to 650 million sold chips within three years.