I don't know but of the tires you mentioned I too notice the Ohtsu popped up no to long ago. Me I would pass on them because I don't go for the cheapest price (Ohtsu came up first and lowest price for the couple vehicles I looked up for tires at DT), and if I remember correctly they are a Chinese tire. Fuzion is another one.
The Arizonian is I believe one of DT house brands by (I believe) Cooper. The Arizonian has expanded to the Arizonian Silver Edition III. Still DT house brand. I ran the Arizonian Silver Edition III on an older Camry knowing we would no longer have that car within a year. No issues with those tires, and in fact instead of selling that car I ended up giving it to a grand daughter and she has put some miles on them with no issues. I'd guess maybe 35k on them and she recently had them rotated at DT and no mention (to me) that she needed new tires yet. I had only put those on because plans on letting the car go. And the day DT put them on, they say if we don't like them within 30 day bring them back and get our money back, but I still need to drive any with something on the car.
The Sentury & Road Hugger it seems I've seen on vehicles for some time, I think.
If there was a tire brand new to the market and DT sells them, I'd be inclined not to buy them not knowing anything about them. Let consumers post reviews and check for reviews from the likes of CR, Tire Rack. Give them time on the market to see what folks say.
My preference is not to buy cheap, go somewhere middle of the road on up on known tires with decent reviews. But also you will find many folks (threads) happy with cheap price tires. If I was on a limited budget then perhaps I'd consider, but not try and push safety aside for the road/weather conditions or to save a few bucks.
On a side note, I've bought near top priced tires and wasn't as happy with them as I thought I would be.
Another side note, DT house Yokohama YK740 GTX, currently knowing about a half dozen vehicles running them (including my wife, all short in town driving) and all very happy with them. Sized from a Prius to large SUV.