Here is a comparative table between Riva Concert and Harman Kardon Invoke. The speaker of the first product (Riva Concert) is more powerful than that of the second. Riva Concert has a volume very similar to that of Harman Kardon Invoke. Riva Concert is heavier than Harman Kardon Invoke. The first product (Riva Concert) is more expensive than the second. On Riva Concert runs Alexa and on Harman Kardon Invoke runs Cortana. Let's go into detail with the technical data between Riva Concert and Harman Kardon Invoke. Published data is always indicative and may contain errors or be subject to change. Always check official sources.