Having in my possession the Sangean DPR-39, this one has several differences.
First of all, it has an amazing battery life. This is logical because the 39 has a screen always on standby with dim backlight, while the 800 only turns on for a few seconds.
The DT-800 can last for whole days before the 2 Eneloop or LADA (IKEA) batteries I use need to be charged.
The sound from the small speaker is quite good for outdoor listening.
In terms of positives, it has 20 FM presets and 20 AM presets. In the DPR-39, my 5 presets seem few.
Signal reception is very good since I live in an area where every radio struggles.
There is a very nice volume adjustment with small increments from very low to very loud. The sound quality is exceptional in the headphones as well as in the Pioneer amplifier that I have connected it to.
It includes 2 rechargeable GP 1300 mAh batteries AND a charger in the package.
Now, as for the filters, alarm clock, precise narrow or wide search, and other features, they don't particularly concern me because I listen to specific stations and don't search often.
Sangean is a guarantee. My DPR-39 plays continuously for 8-9 hours every day for 2 years without any problems.