Then the DN will be a good fit, in terms of sound quality and sound design it’s superior to the Deluge.
In terms of DT mono sampling it would not advice using it’s input as a pass thru for a stereo signal as it will be mixed down to mono.
As already been mentioned use the DN input which is superior since the gain can be set, and it’s stereo. But if you have the inputs on your interface/mixer it’s gives you a little more control if you can have them on separate channels.
The DT sampling is competent and works well as long as you do not need stereo sampling, i do find it a little limiting since the gain can’t really be set and the monitoring is project based and not global which the DT also is but it’s under the master page and the gain can be set very easily.
I have the Digitakt, Digitone and Analog Heat MK II the Digitakt output goes thru the Analog Heat and the Digitone goes thru the Big Sky before going into separate inputs to my audio interface.
I also have the BlackBox which is a great addition since it gives me 16 pads that i can use for my 8+4 midi tracks on the Digitakt and Digitone.
A good option might be to get the DN and Blackbox used, you could probably get them for the same price as a new Deluge.
Bottomline the Digitakt and Digitone really compliment each other and if you like the Elektron workflow you feel right at home with the Digitone. I’m still amazed at sound it can put out on it’s own, there are plenty of patches you can start with and reverse engineer to learn if you’r not familiar with FM. I’m a total FM newbie so the Digitone will keep me busy for a long time.