After, but not nearly as much.
You don’t get nearly the flight time in F15 units due to cost and mission so it’s kind of boring.
I’m always amazed at how the MiG-19’s came up and took down Roger Locher and his front-seater Bob Lodge - I can only guess he’d (Lodge) turned down his headset - his wingman said he was yelling at him. Wiki says it was a J-6 in reality.
Amazing that Roger Locher evaded capture for 23 days until rescued.