As a pilot..the Tomcat is going to be much more difficult to effectively fly and fight vs the F-15. Because it's larger and heavier, even with the big fat GE's in the B vs the TF30's and their well known issues with the A, energy management and pre-planning maneuvers will be critical.
The Eagle has a bit of control assist in that it'll automatically kick the rudders in a bit with a turn to keep it stable and going where you want it to. The Tomcat, presumably since it didn't have it in reality until the 90's with the DFCS, won't have any form of assist..so if you go too hard ..hold on because you're going for a ride.
For the Tomcat..think big, fight small. Try not to drop below 350 and about 8,000 feet, otherwise you'll be faced with a situation where you can't turn, can't regain energy and will be a grape, ripe for picking.