like sitting on floor versus on sofa type of degradation.
ONLY if you would be off-roading otherwise very bad decision to go from oshan to fortuner.
Same can be said for Toyota Pakistan.
Totally depends on how long you wanna keep, would recommend original as you intend to keep it for 5 years. Do not cheap out on headlights.
Even if you intend to keep it at least for 20 years, it will be reliable as long as you maintain it.