The word is the same, but the meaning is different.

In the Corporate Presentation "stealth" is associated with "undiscovered" and "unknown" (the latter words are on the same slide), i.e. POET's limited exposure is more or less unintentional. I'd say it is a consequence of POET having been developed mostly in an academic environment.

On the other hand, the "stealth mode" we discussed here recently is a measure to purposely hide a company or its achievements from potential competitors.

My opinions, of course.