[westopher]

Kitchen staff makes less hourly on average than servers. That being said, your income is consistent, and you can budget accordingly. If you actually are interested on working in a kitchen, go get a dishwashing job, start peeling the shit out of some potatoes. You can make shit to work at an amazing restaurant, or make good money to work at a shit restaurant. Corporate chains are the only way to make money in the industry as anything below the sous chef/chef level.
TL/dr
for a student, FOH is better because it takes much less time out of your schedule, to make similar money. However, the money or hours isn't always consistent.