I mentioned it one of my posts. I can consider myself an SME as far as this goes:
The F-15E's undergone, in the last five years, two major revisions and upgrades - Suite 5 and Suite 6. Suite 6 notably had the larger impact as it introduced JHMCS to the front cockpit (Suite 7 will introduce it to the back) and allowed capability of Small Diameter Bombs (wheee!) and the AN/ASQ-236 radar mapping pod. There's oodles of other features that both suites introduced, such as the replacement of the 8mm VTRS for a DVR (the 8mm player itself is being deprecated in Suite 7 IIRC), as well as the obligatory secret squirrel kind of stuff.
Regardless, the point is the pilots need to learn this stuff. I've used the simulator that Boeing offered as a 'trainer' and it's really not the most impressive thing I've seen.
Now the argument could be that Boeing's offering is good enough, but given how lackluster that thing was (it basically focused only on the core features of the new upgrade, with zero integration with older avionics) I definitely see a fat juicy contract for the F-15E in the future, especially if AETC was pleased with ED's offering for the A-10C. I've thought about this before and while I don't know what's going on in the F/A-18 world, I do know that the F-35 is supposed to replace them, so I'm skeptical that the F/A-18Cs (the legacy Hornet, not even the Superhornet) would have any interest for the US military, which would tell me that if a 'military' trainer for the F/A-18C is in the works, it would be for a country such as Canada, Finland, or maybe even Kuwait.
That said, the F-15E is getting a batrilljion dollars invested into it to make it even better and, well, someone has to learn this stuff at some point.
So on the 'which has more contract potential' we have:
A) Clunky old useless pile of crap that's already been rendered obsolete by two different airframes...
or
B) A state-of-the-art fighter getting new upgrades on a regular basis that has zero replacement and is forecast to be in use for the next 15 years.