When comparing Shadowrun vs Tri-Stat dX, the Slant community recommends Shadowrun for most people. In the question“What are the best tabletop RPGs?” Shadowrun is ranked 17th while Tri-Stat dX is ranked 22nd.
Ranked in these QuestionsQuestion Ranking
Pro In-depth character creation
Pro Free download
Pro No fixed setting
The Tri-Stat system has been used in multiple genres, including Silver-Age Sentinels (superheroes), Ex Machina (cyberpunk), Dreaming Cities (urban fantasy), Tekumel (fantasy), and BESM (anime--multi-genre by itself).
Not so rules-light that you don't know how to play, and not so rules heavy that you get bogged down studying books.
Con Character creation can take a long time
Con Urban Fantasy isn't for everyone
Con Out of print
Guardians of Order, the original publisher, is defunct. White Wolf acquired the rights, but hasn't continued support. There were many rulebooks created using this system, but don't expect any more.