Screen replacement
iPhone OLED screens (iPhone 12 and newer) are generally more expensive to replace than Samsung equivalents due to Apple's parts pricing. However, Samsung's curved-edge displays on the S series can be trickier and sometimes pricier to repair correctly without specialist tools.
Battery replacement
Both brands have similar battery replacement costs. iPhone batteries tend to be slightly more standardised across generations, while Samsung mid-range phones often have more affordable options.
Charging port repair
USB-C ports on newer iPhones and Samsung devices are comparable in cost and complexity. Older Lightning-port iPhones are slightly easier to source parts for.
Water damage recovery
Samsung flagships often have a higher IP rating than iPhones at similar price points, but the cost of water damage recovery is broadly similar for both brands once inside a repair lab.
Overall verdict
For most common repairs, costs are comparable. Your choice of brand shouldn't be driven by repairability alone — but knowing that professional repair is affordable for both is reassuring. FonePro repairs both iPhone and Samsung to the same high standard.