Snapdragon is produced by the chipset Qualcomm (American) company. In a Snapdragon chipset SOC there is a CPU, a GPU, image processor, a media processor, DSP (digital signal processor), cellular modem unit, WiFi module, radio module, GPS module etc. Due to these modules and processor their chips are very expensive.
Battery Life: Snapdragon chipset gives the best life than other battery in terms of efficiency.
It is a Taiwanese company. They made processor like eight-core, six-core and ten core.
Battery Life: According to chipset performance Mediatek using too much battery. Due to the use of more cores they are backward in terms of battery life.
Performance: Performance of their processor is very good. Due to the extra core Mediatek processor are able to do intensive and heavy tasks and they are very good at multi. If it has enough RAM then it’s core can provide maximum efficiency.
Heating problem: The biggest problem of Mediatek is that, it becomes hot within a short time. Due to greater core more heat is produced.
Graphics: Mediatek uses Mali graphics, which is a third-party graphics. As a result CPU and GPU are different and do not match the performances of all time. Beside these Mediatek does not do any research, they only buy the parts sold by the SOC. They just only buy the parts and sold them after converting into SOC.
Overall, considering all the things it can be said that though the price is high Snapdragon chipset is the best.