The 9.3x57 is factory loaded to low pressures to avoid damage to older guns since cartridge was introduced around 1900. In a strong action it can be loaded to equal or better .358 Win loads of 250gr/2400fps. This is equal to the factory Remington load for the .35 Whelen with 250gr today.
I will be chronographing some loads later this summer and expect to drive 270gr Speers at close to 2400fps and 285 Hornady to 2300+.
The 9.3x62 can be loaded 270gr/2600fps at the same pressures.
Both my rifles are Husqvarna hi-powers a 146 and 640 both with FN large ring 98 action.
The 9.3x62 with max loads comes very close to factory .375H&H performance.The recoil is noticeable, similar to a .338Win Mag.The 9.3x57 is relatively fun to shoot and is well suited to hunting in wooded areas where game will be shot within 200yds.

Both of these cartridges are very efficient in that they can produce the same amount of energy as smaller calibers that burn considerably more powder. They also damage less meat.
The 9.3x57 can be loaded with bullets from 232 to 285gr bullets ( yes there are 320 and 325grs also available but their use in a small case is questionable).
To appreciate the power of the 9.3x62 you just need to know that it is legal to use on Cape Buffalo in several African countries.