Normally the cross-string harp works pretty good, from the point of Spanish Baroque harp. One row is the diatonics (left), the other is semitones (right), and they are crossing pretty high up. Spanish harp was usually played standing, mostly because of that – you should pluck the strings near crossing for semitones to be accessible. This type of chromatic non-pedal harp allows fast dumping, very necessar in phrasing of Spanish music.
That Muma harp looks really… weird, to say honestly, whilst the Spanish prototype is pretty elegant

The picture is from http://www.thurau-harps.com