Complex sentence: Unlike the original Cray-1, the Cray-2 had difficulties delivering peak performance, and other machines from the company, like the X-MP and Y-MP outsold the Cray-2 by a wide margin.
Split into simpler sentences: Unlike the original Cray-1, the Cray-2 had difficulties delivering peak performance. Other machines from the company, like the X-MP and Y-MP, outsold the Cray-2 by a wide margin.