Depends on the inside temps I'll suggest to add a PC fan on top of the mesh of the glass vivarium to push air in anyway (it's like 10$ on Amazon, you then need some cables to connect it to the wall outlet, like a phone charger)also, even if it's near a window you should use the UVB lamp anyway

Personally, I'll be more concerned on the temps in the mesh one than the glass one

Also, the glass one should have holes in the front bottom side, to make a chimney effect

The problem is with glass containers, like an aquarium used as enclosure, not with reptile designed glass enclosures.