The former is a homage to perhaps the most pervasive/prevalent (depending on your opinion) character and usage idiosyncrasy of Helvetica, playfully exaggerating the use of overly negative leading, often to the point where it obfuscates legibility yet not readability, which in this case is provided by the use of negative space from the original text, which itself is in conflict to Helvetica's intended usage.
The latter a subtle reworking of Neue Helvetica 25 Ultra Light, transforming Helvetica from it's famed unified weight of individual characters, into continuous strokes forms, and in the process stripping Helvetica of much of it neutrality, yet continuing to maintain its familiar form.