Ok then, I'll argue that if it's a consistent thing, then food > sleep.
Getting more sleep is obviously beneficial. You'll likely feel better, be stronger, more alert, all that. If we are discussing just getting stronger, then yeah I'd probably go with sleep.
But for muscular gains, eating at maintenance (true maintenance for this hypothetical) will result in no significant muscular growth IMO. Yeah, you can recomp to a degree, but even that usually takes carb cycling and such into account, and for this scenario we aren't really talking about making adjustments daily to make up for the meal vs sleep thing. Your body NEEDS some kind of surplus to build muscle. If it's truly maintenance, and you're breaking even every night, I think you'll basically just spin your wheels if trying to make optimal muscular gains.
Sleep is important, but an hour of sleep lost isn't going to be the death of anyone. lol. Your body can adjust to less sleep, and compensate. Your body can't manufacture more calories. Oh, and the whole GH release while sleeping and such, I'm not giving that any real consideration, because an hour lost of GH or whatever natural hormones are released during sleep is going to be minimum at best. The only real value IMO of sleep is for CNS recovery and such, not so much growth.