1.6 Altis is your best bet, you won’t regret it. Although, Grande is said to have better fuel economy than 1.6 Altis, that might be true, I own a 1.6 2016 Altis, and it’s fuel average in the city ranges between 10-13km/L, on a stop and go traffic, though I haven't driven it on the motorway so far, though it's known for giving 16-17km/L on long, which isn't that bad if you ask me. ‘14-15 Grande is a little older in design and the new FL has much better design, leading to a better resale value.
Brother, I'll advise you to no go for metallic color, go for a Super White, it shines much brighter in the sun. About scratches on a metallic color; yes they are more visible to the human eye, and MOSTLY the repainted panels’ paint fades away, indicating that the panel was repainted. This can be avoided if it's repainted from Dealership (MAYBE)
Hope you find car of your interest, best of luck!