The Teak Mahogany Round Bean is a popular choice for furniture and construction due to its durability and aesthetic appeal. When comparing the two, Teak is generally considered better. Teak is known for its natural oil content, which makes it highly resistant to moisture, insects, and decay. This durability ensures that Teak furniture can last for decades without significant wear and tear. Additionally, Teak has a rich golden-brown color that ages gracefully, maintaining its beauty over time.

According to the American Hardwood Export Council (AHEC), Teak has a Janka hardness rating of 2,664 lbf (pounds-force), making it one of the hardest woods available. This high hardness rating contributes to its longevity and ability to withstand heavy use. In contrast, Mahogany has a Janka hardness rating of around 1,820 lbf, which is still impressive but not as high as Teak. This difference in hardness means that Teak is more resistant to dents and scratches, making it a better choice for high-traffic areas.

Furthermore, Teak's natural oils provide excellent weather resistance, making it ideal for outdoor furniture. This is a significant advantage over Mahogany, which is more susceptible to cracking and warping when exposed to moisture and extreme temperatures. The AHEC also notes that Teak has a higher resistance to moisture absorption, which further enhances its suitability for outdoor use.

In terms of sustainability, Teak is often harvested from responsibly managed forests, ensuring that the supply is sustainable. Mahogany, on the other hand, is a protected species in many countries, and its harvesting is subject to strict regulations. This makes Teak a more environmentally friendly option for those concerned about sustainability.

In conclusion, Teak is the superior choice for the Teak Mahogany Round Bean due to its superior durability, hardness, weather resistance, and sustainability. These factors make Teak a long-lasting and aesthetically pleasing option for furniture and construction projects.