I don't have any experiences with the Digital, but I do have a P10. The other smoker is called the Bradley Smart Smoker BS916. I see a lot of complaints about their app. If you don't see the Smart Smoker on the Bradley website, I would have concerns about how long they will continue to produce them. The P10 doesn't have either wi-fi or Bluetooth. I personally like it for my needs, and I have an Old Bradley Smoker that I can use for cold smoking. If you do a lot of cold smoking the P10 may not be the smoker for you. I can do some limited cold smoking, but I do need to place ice in the cabinet, so far each time I tried cold smoking, I was only able to get a couple of hours of smoke time before it went beyond 90°F. My area is now having cooler temperatures, so this weekend I'm going to cold smoke some salmon, and see how that goes.
It does keep tight temperatures, but my trials showed that the actual temperatures are higher than what the display indicates. Take a look at my posts in the P10 topic section. it's more suited for cooking barbecue (with or without smoke), and with 1000 watts available it can tackle any barbecue needs. The trays are larger, and with a little trimming you can fit 2 slabs of St. Louis spare ribs or 2 Baby Backs on each tray. The two 400 watt elements give more even temperatures from front to back. The trays are also wide enough to hold a 9x13 pan, so I frequently will place a pan on a rack, below the rack that has the meat. That helps with cleanup. It comes with 4 trays, with five rack positions, but if you are careful, there are positions in-between those five racks that can be utilized. Smoking sausage shouldn't be a problem in the P10.
If you have any specific questions about the P10 be sure to ask.