MPS and Burmistrov are the exact opposites from one another. Paajarvi has the build and talent, but has a ten cent brain. Burmistrov doesn't have the build but has the brains and the talent.
Paajarvi's raw tools are salivatory, but I'm not sure he'll be able to put it all together. A change of scenery may do good, but that's a big gamble.
Burmistrov needs a coach that tells him to worry about offense and hit the gym. He's already a good two way player; it was his calling card his draft year.
As far as having a good and long NHL career, if I'm a betting man, I'd go with Burmistrov.
However, when it comes down to it, you have the chance to draft someone that will be better than both MPS and Burmistrov at 7th overall. The difference between 7th overall and 13th overall is massive this year. The top tier of the draft is about 8 players deep, and then there's a drop off. Jones, Drouin, Mackinnon make up the top tier. Barkov, Nichushkin, Monahan, Lindholm, Nurse round out the top 8. From 8 on, you're looking at projects and players with big question marks. The only two guys I'd want at 13 are Shinkaruk and Pulock, but I think they'll be gone before 13.
In the 7th and Paajarvi or 13th and Burmistrov argument, I'd go with the first package, but I'd possibly look to flip Paajarvi next offseason if he doesn't show any signs of breaking out with a new team.