consultant 與 contractor 的區別

在 Embedded Muse 204 Copyright 2011 TGG February 22, 2011 (The Ganssle Group) 內看到一段話談到consultant與contractor的區別，因為角色與價值之差異，mindset也不同。

[At the risk of sounding like a jerk, I wonder if you do/will make a distinction between a "consultant" and a "contractor". It's not about title or prestige, it's about role and value. A consultant should bring extraordinary insight, value, and mentoring/teaching skills to the table. He/she should leave the group, not just the code/project, in a better state.]