My game is running at a significantly lower frame rate on the windows store client than the web client

In my game, playing on the Windows Store version consistenly has lower frame rates than the web client.

I’ve made sure that all the variables I can control are the same:
The players are standing in the exact same positions, the cameras are pointed at the exact same place, the graphics settings are the same, the resolution is the same and fps cap is the same.

I noticed that the windows store client drawing a lot more triangles as well as a lot more instances.

Does anyone know what causes this behaviour and if so, what could I do to fix it?

Windows Store:
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Web:
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Windows Store:
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Web:
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Windows Store:
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Web:
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The windows store client is just bad in general so don’t worry about it. Most people don’t use it anyway.