While that war won't probably happen ITTL due to butterflies flapping their wings, the change here might have actually more significance than it looks at first. Sweden would have still Gällivare on their side of the border which also is a mine town.
Precisely my thought, the immediate impact of this change is almost zero, and even the butterflies will be relatively few at first, but once they get flapping it could turn out to have major consequences.
The Kiruna mine might actually be inhibited by the fact that the nearest Baltic port is now on foreign (Swedish) soil. When it is developed, the ore might well be shipped by rail south to Tornio on the Russian rail network. If a railway line is pushed through to the Norwegian coast, it will probably need to serve both Gällivare and Kiruna to be economically viable. I'm not sure how that would play politically, especially with the break of gauge.
On the other hand, Kiruna could provide a catalyst to industrialisation of Lapland, possibly even with a steel mill like that at Tornio coming along much earlier. That would probably see the Russians push a line through to Narvik as an export port for their goods.
The only person of note I can find from the affected area is the botanist and Lutheran minister Lars Levi Laestadius, who has just become Russian and probably won't now be going to Uppsala university. Looking at his biography, he'll probably still become a revivalist minister amongst the Sami, but his botanical interests aren't likely to develop.