Reliable Velocity isn't a pure iron, it is a vapor generator (2 heating elements). Rowenta has a steam generator. Separate tank, so iron is lighter.
If you live in a humid climate, a regular steam iron might seem like it puts out a lot of steam. If you live where it's dry and have forced hot air heat in the winter, you can't even see steam from a regular iron.
The Reliable puts out so much (you can adjust) that you have to use finger guards if you are using bias binding tips.