If you are choosing what to sell first, resale strength matters as much as the original sticker price. In India's current buyback market, recent iPhones still lead on retained value, but the gap is not automatic for every Android flagship.
Apple's advantage is liquidity. More buyers want recent iPhones, which means faster resale and tighter pricing. Storage tier still matters — 128 GB and above clear more easily than base models from older years.
On Android, Samsung Galaxy S and selected OnePlus / Google Pixel flagships hold up better than mid-range lines. The catch is fragmentation: two phones launched in the same year can diverge wildly once software support and camera reputation enter the picture.
Condition and completeness still beat brand myths. A clean Android flagship with box and bill can out-earn a heavily worn older iPhone. Always quote the actual device in hand instead of relying on last year's forum averages.