the 6061 is 65.5 and the 7075 is 69.9… (according to Generalyo.com).
Ernie said the following on FB: “I adjusted it at the machine, so the 6061, is only 1 gram lighter at 65.9. 7075= 66.9.”
Edit: When I get the 6061 in, I can weigh them and see for sure what their weights are.
I don’t think the 7075 feels very heavy, but then again I like my throws a tad on the heavier side.
I will be interested to see which I like better, after reading the 6061 vs 7075 stuff.
Edit #2: I’m going to predict I like the both the same. 