A chord sequencer is an awesome tool

But misses the one thing that makes BIAB often sound better then an arranger..
BIAB uses its knowledge of upcomming chordchanges in the transition between chords..
Making the backing much more dynamic.

There is no difference in the normal backing of the arranger
and backing played with a chord arranger.

the advantage of a chord sequencer is that you can loop it, stop it and play normal arranger chords on demand..
An easy accessible chord sequencer is one of the things most missing on my Genos.