Both
BMW motorcycles are generally known for their quality engineering, advanced electronics, and premium features.The F900R is likely to have a distinct BMW styling and design, which may appeal to those who prefer the brand's aesthetics.
When deciding whether to purchase the Triumph Street Triple RS 2020 or wait for the BMW F900R, it's important to consider factors such as availability, pricing, and your personal preferences regarding performance, brand, and design. If you have a specific affinity for BMW motorcycles and are interested in the features and performance that the F900R is expected to offer, waiting for its release may be worth considering. However, if you're drawn to the proven performance and reputation of the Triumph Street Triple RS, it could be a great choice as well.
Ultimately, I recommend researching and comparing the specifications, reviews, and availability of both motorcycles closer to the time of your purchase decision to make an informed choice based on the most up-to-date information. Additionally, test riding both models, if possible, can provide valuable insights into their respective characteristics and help you determine which one suits you best.