Adam,
I had a Yaesu FT-891, and the receiver is hot, maybe too hot! Also it has a strong audio output amplifier designed to mobile use. I sold the FT-891, even though I loved it, and bought a QMX, then a QMX+. I have not been disappointed, but the QMXs definitely have different quirks from the FT-891, and even from each other. The FT-891 is in a different class and is designed for different purposes from the QMXs, so it's difficult to compare them fairly.
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73, Dan - W2DLC
Daniel Conklin