I agree that the Blues play similarly to the Kings, but the roster construction is more akin to a lesser version of the Blackhawks. A team that relies heavily on a star winger and two-way centerman for top-end talent at the forward position. Elite caliber defensemen where the opposite side is meant to compliment the skills of the other. A goalie that might not be elite in the traditional definition, but plays so well given the roster and system that it doesn't matter too much. And high end 2nd-line talent with a bottom-6 full of aggressive forechecking.
Now, of course, it's not a perfect 1-to-1 comparison. The Blackhawks had much better elite talent and I'd argue the Blues have better depth throughout their bottom-6, not to mention Brayden Schenn is a better 2nd-line center than anything the Hawks had in those days. But I see a lot of comparisons between the two that I have to think was intentional to some degree on Armstrong's part.
You could definitely make that comparison too. I was thinking the other day how ROR and Tarasenko are basically our own Toews and Kane. Either way, every team were are mentioning here has a #1c, #1W, #1D, and a #1 goaltender. Outside of that, each team has 4-5 core forwards, 2-3 key defensemen, and a good starting goaltender.
Former Kings top 5
Kopitar, Carter, Richards, Brown, and Williams
Former Hawks top 5
Toews, Kane, Sharp, Hossa, and Saad
Current Blues top 5
ROR, Tarasenko, Schenn, Schwartz, and Perron
Kings D
Doughty, Muzzin, Voynov
Blues D
Petro, Parayko, Bouwmeester
Hawks D
Keith, Seabrook, Hjalmarsson
These comparisons blow my mind because fans around the league still think the Blues somehow got lucky through 4 rounds of the playoffs despite their roster construction.