My favorite Revlon Lip Butter color is berry smoothie. I also love Pink Truffle, Cotton candy and Fig Jam. They are all sheer. Fig Jam is the darkest and it looks SCARY when you see it but when you wear it the actual color is absolutely gorgeous. They are so hydrating. Cotton Candy and Pink Truffle are the perfect sheer, subtle colors. Berry Smoothie is also nice and sheer but is more purple-y so it has a bit more punch.
I also have Red Velvet. That one feels great too, but the color is almost opaque. So I like it when I am going out and want red lips. Otherwise, not so much. I barely ever wear it.
EDIT: This is a great review of the Lip Butters - and how I got into them.
http://www.frmheadtotoe.com/2011/12/revlon-lip-butters-review-swatches.html
I only have one Maybelline Baby Lips in Pink Punch. The benefit of Baby Lips is the SPF 20. But the Revlon lip butters are more hydrating.