Is ES6 and JavaScript basically the same?

Answer 1

ECMAScript is general-purpose programming language (6th version was the latest from June 2015 to June 2016). And JavaScript is the most popular implementation of ES (may be even more popular than ES itself). Other ECMAScript's major implementations are SpiderMonkey, V8, ActionScript, JScript, QtScript, InScript, Google Apps Script.
[Source: https://en.wikipedia.org/wiki/ECMAScript]

Answer 2

ES is more of a web standard than a language

But if you see it as a language than JS is a dialect of ES