Sounds like you are raising two responsible and competent young men!
Their school responsibilities will increase in the next year, I imagine, as they get into more difficult and demanding courses in high school. I'm not sure I would upgrade their chores, as it seems like they're keeping up with their belongings, their rooms, and family duties.
At this age (getting licenses and permits) I would sort of change the flow of their chores rather than adding on to them.
For example, if you have cell phones, make sure your sons know what plan you're on, how to read the bill (paper or paperless), and how to make sure no one is exceeding data/minutes/usage. Have your older son review the car insurance documents, demonstrate that he knows who to call in case of an accident or breakdown, and how much insurance costs. Same goes for cable and internet. Ensure they know how much it costs. If either one rents a movie, they pay for it.
And it's a good time to add car maintenance to their list of what they are capable of doing. Have them both learn to change a tire effectively, change oil and filter, and how to choose the right gas (premium or regular) and how much gas costs. If you have any gas rewards through a grocery store, they should know how to use that. And both of them should learn basic car maintenance, and have an emergency car plan and know how to jump start a battery. When my son got his license, I had him pack a small bag that remained in the trunk. It contained gloves, those little hand warmers that they sell at camping/sports stores, a warm hat, flashlight and batteries, power bars, a folding shovel, rope, etc.
They also should know how to plan a meal as well as cook it, and how to shop properly (by price, unit pricing, looking for bargains).
At this age, I feel that some of the most overlooked "chores" are the ones we do all the time but are more the business of owning a home or renting a home, and possessing a car, and paying for utilities and phones, and balancing checkbooks, and those sort of things. I'd make sure your sons are proficient in those areas now that they're approaching driving age.