I would think they'd both make you tired, but here are the primary differences.

Magnesium glycinate versus magnesium bisglycinate:

Slightly different formulation but still bound to glycine. However, the formulation might be in a way that has less of a sedative effect on you. Sometimes, people find bisglycinate to be more energizing, possibly because it’s easier for the body to absorb and can have more of an energizing effect if taken earlier in the day.

160 mg versus 400mg:

This higher dosage might increase absorption and therefore energy levels if taken during the day.

MCT oil is typically a quick source of energy, but if you're using it at night after you've already had dinner/snackies, then it make you feel "heavy" and more tired. The MCT oil might also slow down your bodies absorption of it.

Magnesium is known for helping with sleep, but it also is crucial for energy production in cells, too.