Mounting Medium - Moss vs Coir

[voyager]

I have used Chilean and NZ moss extensively for years for mounting my orchids.
I began using it on in-home orchids under very low winter humidity conditions.
It worked very well for me.
I could probably be accurately described as a fanatical proponent of the use of moss.
I have continued to use it after moving to a relatively higher rainfall and humidity location.
I am now reluctantly beginning to think that it may retain too much water for too long under my present outdoor conditions, at least for some of my orchids.

The local farmer's Supply Co-Op carries both Chilean moss and Coir.
The Coir is less expensive [local product?].
I have never used it before and am concerned that it may not suite my needs.

I am considering mixing the mediums if needed to get the retention qualities I need.
I have done similar before using moss and pumice stone for my potted orchids.
by varying the percentages, I could get a potting medium almost perfectly suited to each plant and not need to re-pot until the old dead roots were the problem with the medium.

Has any one used both materials and is familiar as to how they compare in water retention, durability, etc?