Yes it is; and more so than the V20 by the normal definition. This is LG showing off it's vision for 2017, while the V20 is more of a niche product - even though compared to the G5, the V20 would be a slam dunk for anyone that didn't value the stand alone features of the G5 (smaller, modules, etc), assuming they were the same price. The V20 really knocked it out of the park when compared to the G5, but the G5 was the flagship while the V20 was meant for a very different core group of customers.
The G6 fixes a lot of what people didn't love about the G5 and adds some of it's own improvements. For most consumers, the G6 will be a better choice than the V20, although for a large niche crowd here in the forums, obviously the V20 has some features that the G6 doesn't - but that's true in both directions, if you think about it, a lot of it boils down to what features you value more than others.
The G6 is likely to be much more popular with mainstream consumers, which translates into sales, etc.