The battery thing with DT is what it is… If you forget to take it out, flip it, etc. you’ll eat batteries up. Rechargeable are (I think) a good option regardless of that. As you probably know, with NCE throttles you can “turn it off” when done, and the batteries don’t get chewed up.
The other big difference, and the one I think might merit the switch to NCE, is that the NCE wireless system is full duplex - the throttle talks to the system, but the system also talks to the throttle. Digitrax uses a simplex (one way) system. The throttle can talk to the system, but can’t receive any info back from it.
Biggest effect of this difference is that you rarely (if ever) have to plug in your NCE throttle to to anything. Digitrax throttles, because they are one-way, have to be plugged in to acquire a loco, for example. DT says it’s a safety feature to avoid mistakenly sending the wrong loco off and running, but the reason you need the ‘safety feature’ is that one-way system: the DT system can’t tell the throttle “yes, you’ve selected loco 4060” (unless it’s plugged in.)
The simpler way to think of it is “you can do anything with an NCE wireless throttle without plugging in”… In building my new layout, I literally haven’t even put the plug-in faceplate up yet and have programmed and run many locos many times in the course of testing the trackwork. (I’ll put it in eventually for emergency use, but the fact I’ve gone without it so long is indicative).
So anything for which you do have to plug in your DT throttle (acquiring a loco, programming, etc.) is a difference between the systems.
Some people say they don’t mind this. Some people claim to actually like being forced to plug in to acquire a loco. For me, it drives me NUTS. In my book, it defeats a lot of the purpose of wireless if I’m constantly having to plug in.
YMMV of course, but especially when discussing wireless, the duplex/simplex thing is absolutely the single most significant di