UJ has more vibration from what i can remember, and harder to balance as the shafts move around a fair bit. (both along axis and off axis)
The more you change speed and bending angle, the worse it gets
CV joint keeps everything in plane. So its (pretty much) tolerant to all variables. Until you get to silly angles of articulation.
Handling effects are pretty much limited to how much vibration you can live with.
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