Here is my experience
I had an Ozone DELTA 3 glider size MS (75-95) and my total flighing weight was about 95. I bought it like that in 2020. It was said at the time that it was better to fly on the top part of the weight segment especially for mountain crosses.
Having flown 4 years with it I can say there was mainly 2 inconvenients.
1 : higher speed when landing was difficult some times to manage and my landings were often not good...
2 : when flying in weak thermal or weak dynamic conditions my higher falling rate compared to other pilots made me go more quickly to the ground. It was more difficult to exploit weak ascending currents...
I have now changed to a glider 85-105 size ML and I find that doing a good landing is easier because it is slower, and it seems that I do better in weak ascending conditions.
Enjoy your flights!
Pierre