Hello Gueseequie23
I think with luggage, 8 minutes is fine if both platforms are between 5 and 20.
The ’french side ’platforms 31-33 and the ‘swiss side’ platforms 1-4 are not as easy to find if you don’t know the station well or are carrying a lot of or heavy luggage. Afaik, the default case will be that both trains are in the 5-20 range, but in the case of a change of platform, you might have to hurry a little.