The only way to find out if any arranger suits what you want is to try it yourself, forget MP3 or YouTube demos as in most cases they have little in common with the real deal, hence you find EBay is littered with new arrangers that have been sold on because they did not match the demos, or on the other side, users of arrangers cannot understand why others find certain models lack lustre (Usually after hearing MP3 or YouTube demos) when it does everything and more they could ever wish for.

Yes it’s perfectly acceptable to comment on MP3 and YouTube demos, so long as you remember you are commenting on the demo, NOT the real instrument.

You wouldn’t buy a quality audio system without hearing and trying it first hand, and an arranger is no different.

As to which is better (Audio or Midi) then both have advantages and disadvantages, which is why in professional studios and film production they use both, so forget about my Audio is better than your Midi (And vice versa) and just enjoy what suits you.

Bill