The Koshi chimes are made of bamboo the Zaphir chimes are mostly made of recycled materials.
Koshis have a more bell-like tone as their resonance tube is longer and narrower.
The resonance tube of the Koshi measures approximately 6.29 in x 2.36 in.
Due to the weight and the drop-shaped bamboo plate of the Koshi it needs more movement or wind than a Zaphir chime.
The resonance tube of the Zaphir chime has been designed by Da Vincis “Golden Ratio” and measures approximately 4.72 in x 2.36 in.
If you compare the sound of a Zaphir to a Koshi, the Zaphir has a crystal clear sound and the tunes need more time to fade away. A Zaphir works well in wind-protected areas, as the plate where the wind touches is relatively big.
Koshis are available in 4 different tunings according to the traditional elements; Earth, Wind, Fire and Water
The colored Zaphir chimes are available in 5 different tunings in relation to the 5 elements and Feng Shui: Spring, Summer, Autumn, Winter and Intermediary Season
You can find a more detailed description with audio samples of the different seasons here.