WARPLANES: F-15EX Breaks The Right Records At The Right Time
The F-15EX is cheaper to buy and operate than the F-35 and, for missions that do not depend a lot on stealth, the F-15EX is cheaper and more capable. New versions of the F-35 close that gap but for now the F-15EX is here and the new F-35A Block 4 models have been delayed because of problems with the new software. That has halted efforts to reduce the F-15EX orders from 140 to 80. The F-15EX has met or exceeded all its capabilities.
Lots of data in this How To Make War post.