S600 vs. S620

[jchance]

I have seen the specs on the newer version but my question is more about parts interchangability and annual kits. I hope someone from Scubapro like Jules will chime in but I am not holding my breath. The smaller 620 has improved ease of breathing but other than a smaller case and lever, are the air barrel and diaphragm the same? In other words, what are the physical differences?

Thanks!

 

[ladra]

This might help you little bit.