Comparison: Free to Be Serene vs. Free to Be Tranquil and Energy Bras
Ruby Red Free to Be Serene Bra compared to the Free to Be Tranquil Bra. The biggest difference between these two bras is that the Serene has a wider waistband and it has more coverage in front. As a DD I find both bras low support but they're both comfortable. I tend to fall out the bottom of the Tranquil so the thicker waistband on the Serene is a nice improvement.
Ruby Red Free to Be Serene compared to the Energy Bra. The Energy Bra provides a lot more support than the Serene.