How does the exposure to simulated altitude compare with natural elevation?

Altitude acclimatization is due to the amount of oxygen.

Whether you are at 9000' above sea level or in a CAT simulated altitude system, the common factor is the density of oxygen; The same number of oxygen molecules per cubic meter exists in both scenarios.

• How does the exposure to simulated altitude compare with natural elevation?
• What are the advantages of simulated altitude?
• What types of athletes will benefit from altitude training?
• How does a CAT simulated altitude system compare to IHT mask-based systems?
• I already live at high altitude; will CAT's systems still help me?
• Which of CAT's systems would be most suitable for my needs?
• What scale of project can CAT handle?