Ok, Let’s first quickly rehearse the foundation of these two opposing yet very high profile business ideas.
Disrupstive innovation is innovation that helps create a new market and value network, and eventually disrupts an existing market and value network (over a few years or decades), displacing an earlier technology. These are innovations that improve a product or service in ways that the market does not expect, typically first by designing for a different set of consumers in a new market and later by lowering prices in the existing market.
Sustaining innovation evolves existing markets and vale networks with better “value”, allowing the players within to compete against each other's sustaining improvements. Sustaining innovations may be either "transformational "or "evolutionary."