Originally Posted by Cymon

The "TRD Off-Road" models were formally called the "Trail" model (I believe prior to 2018). In those models they did not come with side badging because there was no such thing as "TRD Off-Road". So you could tell a SR5 (had side badging), Limited (had side badging), TRD Pro (had side badging) and Trail (current TRD Off-Road with no side badging) apart. It is the same thing as the current "TRD Off-Road" minus the badging. So it is probably listed as "TRD Off-Road" because the configuration matches the current model name, but at that time it was called the "Trail". Just something Toyota did for sales, because if it has "TRD" on it with a different front skid plate they could mark up the price a couple thousand dollars.

Edit: People used to actually make and sell "Trail" side badging because it didn't come with a badge from factory.