The important difference is the amount of injuries that the forkball bas caused to many many many pitchers shoulders and elbows.
And it sounds like your definetly throwing a forkball, not a splitter. A real splitter does not have a knuckling action. A splitter should at least look somewhat like a fastball, and really nothing like a knuckleball. If you want an example of a real (and fricking awesome) splitter, look up videos of Roger Clemens when he throws his.
FYI-----Both the Splitter and Forkball are great pitches when thrown correctly, but even then they can, and have been know to, cause many injuries. The forkball, when thrown correctly, or incorrectly, can cause alot of damage to the shoulder and elbow, but especially the shoulder. And when you throw these pitches, with the ball pushed back between your fingers, your putting ALOT of undue stress on the ligaments in your elbow and forearm, and this can lead to horrible cases of Tendinitis that will stick with you for a very long time, ligament and tendon tears, and much much more. The worst of which will be Tommy John, and I think everyone can agree, that is not something you ever want to have.
I do not want to tell you how to pitch, but you can do some serious damage to your arm, and your career, throwing these pitches. Do your self a favor and think about trying something new.[/quote]
Wow. I must admit I had no idea about that. I will definetly keep that in mind.
What even made me start throwing the apparently forkball was just the fact it felt natural and really, I use the same exact motion as when throwing my fastball.
It all began when I was messing around a bit when playing catch trying different stuff. I wanted to just try the splitter grip I had seen around the net and videos. Despite having the ball deep between my fingers it really didn’t even feel uncomfortable due my relatively long fingers and big hands so without really telling my buddie about it, I just threw a fastball but with that modified grip. All I heard few seconds after was: “Dude! WTF was that?” 
Apparently the ball looked that it was coming around belt high but few feet before reaching the glove it dipped under his legs.
I really have no idea how a proper splitter/forkball is supposed to be thrown. I discovered my pitch by accident and started throwing it with the same motion and arm speed as my fastball and supposedly it dips like a splitter, and after throwing it to several other teammates they added that it definetly looks and behaves like a fast knuckler. So I guess it’s a forkball then.
I can’t really describe more than by saying that when I throw that particular pitch I got the “feeling” of when to let go and I guess because of the very wide grip I am able to apply the force in a manner that it leaves my arm with high speed but no spin. I haven’t had the chance to experiment much on it facing batters, but I guess now that I know it can damage my arm in long terms I will not use it as a regular pitch anyway.
Now I’m thinking sorta just bring it in 5-10 times a game as a “nice to have” pitch to keep guys off balance and maybe actually not use it at all before they’re facing me the second or third time. Makes sense?
All in all I’ve got a cutter/gyro/weird thing, a slider and a slow curve to add to my fastball.
My problem is that I haven’t yet developed a slow pitch that I can disguise under my fastball arm speed and action. The one that I can is the cutter/gyro/american-football-spin-type of pitch but it goes roughly 2-3 mph’s slower than my fastball. I’d like something to keep batters off balance. A change-up would be awesome, but so far I don’t seem be able to get it slow enough and accurate either. Also it has a totally different spin, not like Edwar Ramirez’s change that really looks like a fastball. Mine’s just more like a crappy fastball at the moment…
Any ideas from you guys what I’ve maybe missed I could try?