Is there any difference between "My dream came to life." and "My dream came true."?

"My dream came True" can be the fulfilment of a goal and a sense of achievement.

"My Dream came to Life" is hopefully, the start of "My Dream becoming True" it is the exciting growing challenge of your Dream starting, now good luck go get it:)

In the U.S., the first one is uncommon--I've never seen it but I think it would be understood as it is meant. The second is in common use.

I sometimes think of dreams coming to life in the context of someone creating a movie or writing a book.

Different wording, same idea concept?