Both investment plans are available in three risk profiles: Defensive, Neutral, and Offensive.

The main difference between these profiles lies in the proportion of shares and bonds (https://www.medirect.nl/en/investment-plan-triodos-investment-management/#Triodos_beleggingsplan)

Many investors select a profile based on their investment horizon and risk tolerance. As a general principle, the longer you plan to invest and the less you expect to need access to your money, the more risk you may be able to take.