Those two sets are pretty close tension-wise. I don't think there would be any problem.
Now, if you mixed 2 Jamerson flats with 2 light Hi Beams on an old, trussrod-less Hagstrom, over time I think there might be trouble.
Thinking about it, that's a pretty good mix of gauges. The 760FL D and G always seemed too light to me for the E and A.
Report back with your findings.
