If you compare the two products, it's only the different size and look that may account for the price difference.

Length 95 cm or 101 cm
Width 50 cm or 48 cm

Another difference:

In the Stiga Hockey Play Off 21 game, there are players from Sweden and Finland.
Length 95 cm
Width 50 cm

In the Stiga Stanley Cup hockey game, there are figures in the Nhl look.
Length 101 cm
Width 48 cm

In my opinion, the enjoyment of playing is the same for both. The question is whether the player look is worth CHF 100 more to you :P

I hope I was able to help you!