I see it as a goog partner fon A4. It seems lacking synthesis and song mode. The A4 provides such details. Other details like timestretch and the way of transfering samples are unknow.
The OT is the superior choice. Song mode, tons of effects, trigs and tricks. This is like a miniOT. Or a Rytm without synthesis, compressor, but with MIDI.
If I only would have an A4 this would be for me the obvious purchase. Owning the OT and a good multitimbral synth, I don’t see any reason to purchase it, unless I decide I dont want to use scenes and save some money with the change.
Anyway, without song mode this machine needs another elektron