The main difference I hear is the vocal has a lot less echo on it than the Enchanted version. My liner notes aren't in Japanese (it's the Aussie CD )but it doesn't mention CLA, but does say that track was originally published in 1986.
As you mentioned, the differences are subtle, mainly in the instrumentation and it's the less echoey vocal that I like more than the Enchanted version.
Cheers!