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The first of the three links I provided explains this much more eloquently than I, and in much more depth. The other links are discussions regarding other factors affecting compatibility, such as batching, working time/temp and its effect on crystal growth and COE, and other such esoteric brouhaha.
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Assuming that COE 104 glass will have a viscosity difference from COE 96 glass sufficient to compensate for the COE difference is an assumption I would never make nor suggest others make. I'll stay with my original suggestion that making that assumption is a risk. Some are willing to take such risks, some are not.