To my knowledge, Mako doesn't actually make compressors, they are jobbers who resell and/or modify blocks to their specs and resell. Until sometime in the 1980's they imported Bauer units and distributed those. Later, Bauer decided to set up an operation in the USA. Now, Mako are in a business relationship with Compair. I haven't kept up with what the company are doing but know them from their history. Originally, the company was owned by Jordan Klein, a notable character in the diving community known for his "Mako" camera which was kind of an underwater Brownie. As far as the compressors themselves, Bauer is well known to divers but Compair a little less so. However, Compair is a well grounded manufacturer with a long history of quality machines.