Hmmm... they DO look very similar!

Particularly the M65 Sporter vs JJ-91, note the Optilock mounts which must mean a tapered Sako or more likely a straight Tikka dovetail on the receiver:

http://i15.photobucket.com/albums/a396/TilleyMan/TikkaM65.jpg
http://www.jalonen.fi/index.php?mid=5&pid=16