I cannot speak for the Garbo, but I have measured the tension of the Velvet Compas 180 (except the G, that I don't have, but with the high C) and the tension is higher, specially towards the lower strings than the advertised tension. I won't trust the manufacturers specifications (of any manufacturer, not only Velvet) too much.
BTW, the Velvet Classico meets the tension specifications of the Compas 180 rather well.
I need to improve my measurement tool to get more reliable values, so I haven't posted anything about it yet and dislike to post any concrete values before. I will do when I have time to make the changes and measured strings again.