Koivunen is 21. Puustinen was 24 last year. Koivunen has produced more at a younger age in the SHL and AHL than Puustinen did. Koivunen has also shown more versatility than Puustinen, who is basically a finesse perimeter player.
Not comparable.
I think you're overestimating the cost for Lafraniere. His 7-year, $7.45 million cap hit contract kicks in on July 1. That makes him a greater risk as an acquisition.
If the cost for JT Miller is a good young roster player (Chytil), a prospect, and a first, why is Lafraniere bringing in a first, a 30-goal scorer (Rakell), and a young roster player?