If I run a 4 blade through an animal with a razor sharp head....I'm going to get MORE blood on the ground than a razor sharp narrow 2 blade run through the animal in the same exact route.
Once you release the string, the arrow has a route that you can't change, and if you pass through that animal on that path, a 4 blade is going to leave more blood sign than a narrow two blade of the same sharpness.......more vessels cut, more blood will enter the body cavity, and the hole a 4 blade, or 3 blade, will create will let more blood escape the body cavity than the slit of a 2 blade...ESPECIALLY on hogs. I've seen it time and time again trailing other folk's two blade hits on deer and hogs.
The real question is do you have enough power to push a multi blade head completely through an animal???.......I'm confident I do, so I shoot multi blade heads most of the time on the game I hunt...and have no problem blowing through them like they are a sheet of paper unless the off shoulder or leg bone is hit....but its too late then anyway, and I either see them go down in sight, or hear them crash on a dead run.
If you don't feel you have enough power, then a 2 blade would be best for you regardless of the blood trail left....most important to pass completely through the animal for the best blood trail no matter how many blades....and than the edge is still sharp after the fact. Too narrow of a bevel and you'll likely roll the edge with any bone contact...even a rib going in, that will likely cause less blood loss internally to escape on the ground.
There's a whole lot more to consider on a deer than the shoulder, and there's no guarantee that you'll get through the shoulder with a 2 blade...but its pretty much a sure bet that if you goof toward the much larger area of the guts, a multi blade head will not only most likely pass clean through, it will cause more damage and trauma.
I err away from the shoulder on a deer for that very reason, as if you do pass through the shoulder, you very likely can miss the vitals, by hitting above and forward of the lungs, and have a long tracking job....Yep, I've done it in TX twice, as the deer there not only are crazy, they just don't duck, they duck and wheel making your perfect shot a not so perfect shot.
I consider shots on hogs much more closely as their vitals are much more forward.
Just take into consideration your quarry, and what it will take to pass clean through, and make sure you know how to put a PROPER edge on the head of your choice.
Best of luck to ya.