It turns out that Nintendo has made quite a few changes to the Switch with the new OLED model. A major one relates to the cooling system, which is smaller than the LCD model.
Nintendo Switch OLED Model Rear Case Replacement - iFixit Repair Guide
iFixit] Nintendo Switch OLED Teardown: More Different Than You Think : r/ NintendoSwitch
iFixit teardown shows Studio Display is full of surprises
Nintendo Switch OLED Repair - iFixit
OLED Nintendo Switch Teardown
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Nintendo Switch OLED Model Dock Front Case Replacement - iFixit Repair Guide
iFixit disassembled a Nintendo Switch and then taught us how to reass
Nintendo Switch OLED Model Rear Case Replacement - iFixit Repair Guide
iFixit disassembles the Nintendo Switch OLED model to reveal some surprising changes - News
iFixit disassembles the Nintendo Switch OLED model to reveal some surprising changes - News