Berger bullets and Wildcat bullets perform in a similar fashion if they are similar.
Several factors affect a bullets performance and it is very seldom that you can strike animals the same with different bullets so most conclusions are less than scientific. One should bear in mind that I am talking about high sectional density bullets sometimes known as heavy for caliber.
Both Berger and Wildcat bullets will penetrate a long ways if they do not strike too much bone. Some bone is good for expansion but if you hit a big bull elk exactly square on the massive shoulder bone the bullet will explode as will the bone. If you only hit a rib the bullet will pass on through. Once the bullet has slowed down some after initial expansion it will no longer disintegrate but will retain weight and move a long ways. By accident of frozen fingers, I landed a WC bullet in the rear ham of a cow elk and that bullet went all the way into the chest cavity. I have similarly by deliberate intent put a Berger all the way through two adult hogs standing side by side at 550 yards.
Here is the only WC bullet I have ever recovered. It is a 130 gr HP RBBT in 257 cal. It struck a cow elk in the spine and traveled down the spine crushing vertebrae as it went. Retained weight is 57 grains or 44%. It is hard to see in the photo but it is both jacket and core.