Was just doing a search on DH Labs and saw no one had responded to your post so, even though it's old, for "searching" purposes.....
The Power Plus is not shielded, the Power 1 is. The connectors are different if factory terminated.
I own both of these. I haven't found anything better for less and I've found much worse for more.
Both companies are great to work with.
Onemug (Threads | Answers | This Thread)
I love my DH Labs Power Plus!
Jtwrace (Threads | Answers | This Thread)