It may be that there is a 35% price difference because of the availability of service. What I've noticed about air compressors is that the up front cost is nothing compared to getting parts for it. A number of years ago, CocoView Resort bought a pair of Chinese knockoffs of an already outdated Ingersoll Rand design, with full warrenty and the whole 9 yards. Paid less than half that they would have paid for a new Bauer of the same pressure and flow. When it came time for the service, they had to ship them back to China (literally, from Roatan to China for service) for valve service, etc. Now, you may think that losing your compressors for a number of months and incurring shipping costs from Roatan to China is a good deal, but I'm not so sure.
Short story is, both Bauers and Coltri's are good units, but it's the after installation service that will make a difference to you. I am a Mako fanboy, mine have treated me very well, but I wouldn't recommend them for Bali, or any other kind of out of the way place as far as compressor parts go. You can have Bauer parts shipped in from 20 places in the world to Bali the next day. YMMV.