The Yeti Passion Three has also baffles instead of being stitched through. The baffles are however very short. The Passion Three would be a competitor to the Western Mountaineering Summerlite. I tried both bags. The Yeti has far more room inside. I would choose the WM however cause I like a slim fit. The down of both bags is really good; I don't see however an advantage of the so called 900 cuin Yeti down. The Passion Three weights 542 g / 19,08 oz in the real world and will fit a person 190 cm / 6,23 feet tall. The WM Summerlite in large weights 580 g / 20,42 oz (19,7 oz in theory). The Yetis are very expensive even in Germany compared to WM bags and might be beyond price in the USA.
PS: I think it's a good idea to have full length zippers on bags like Yeti Passion Three or WM Summerlite. You can easily use it as a quilt in warmer temps.