The non-TR tyres come out of the same mould as the dual plies, so the bead doesn’t have that squared off UST style cross-section. However, they work just fine tubeless.
There’s the old 2.5 versions (with the next size down being the 2.35) and then the new 2.5 and 2.4 versions (with the next size down being 2.3). Many of the new 2.5 and 2.4 tyres are WT (wide tread) and designed for 35mm rims.
The bigger carcasses also tend to have bigger knobs.
It’s bloody confusing!
I have 2.3 TR (DHR2, Minion SS and Shorty), 2.4 non-TR (High Roller 2) and 2.5 TR WT (Shorty). All great!