it's all a matter of your opinion honestly. if you think it looks good then go for it. I like how they look together. I have the stock trunk spoiler on mine and bought a oem roof spoiler, but haven't installed it yet (since the car is now for sale). I think the roof spoiler might look better with a different trunk spoiler that matches the lines and style better.
2013 F150 4x4 SCrew XLT 5.0L
Midwest Crew #22
Official FocusFest Event Planner