Nick,
Ive had a look at your performance comparison charts.
If your data is based on the EH101 having a MAUM of 14600Kg as shown in the manufacturers graphs in the files you show links to; it would appear that given the EH101's new MAUM of 15636 Kg(34400Lbs) as on the US101 website, the 101 carries more payload than the 92. Am I reading this right? Because if so, the 101 at the 300SM range point you quote would carry 400Kg more than the 92?
cheers