Earlier quoted context omitted.
Edge is an evolution of Internet Explorer. They removed some of the quirks they have added over the years, modernized the engine, but it's Internet Explorer to its core. It's just rebranded.
No, it's a new browser built from the ground up with none of the baggage of IE.
https://www.neowin.net/news/whats-powering-spartan-internet-...:
> The Spartan rendering engine (edgehtml.dll) is a new component and separate from Trident (mshtml.dll). The new engine began as a fork of Trident, but has since diverged rapidly over the past many months, similar to how several other browser engines have started as forks prior to diverging. The new rendering engine is also being built with a very different set of principles than Trident - for example: a focus on interoperability and the removal of document modes.