Is the Scosche harness the only one that will work, or is that just the brand that Crutchfield sells?

While I'm waiting for some other parts to come in, I picked up the harness from my local shop and they gave me a different brand (but they pulled the model number off Crutchfield right in front of me). They also had a version with RCA outs to the factory amp, but I told them I'd take the non-RCA because that is what the link in this thread provided.

Does it sound like I'll be kosher here?