It's just that the Core 6 in Chicago pretty much have as many games as everyone else on both teams combined. That said, I actually like Edmonton's experience better after those 6. A lot of these players were together for 13 game run three years ago, Neal and Green have a lot of playoff experience, Chiasson has a cup ring, Smith has experience in playoffs as well, and most of the newer non-rookie recruits have at least played in a playoff series or two.
Tippett does have the option to dress a lineup where the only players without a playoff game would be KY, Bear and whoever dresses out of Khaira, Haas and Nygard. I wouldn't be surprised if that's the exact route he takes at least for game 1.