I have done lots of diving in both, I dove the Atomic Splits for about a year, until a panel rotted and fell out. I replaced them with the Apollo's which I used for a couple of months until I sold them to a friend that liked them more than I.
As for reviews.
Both the Apollos and the ForceFins excellent fins. I'll start with the Apollo, its a great fin, its comfortable, easy to kick and can provide all the speed/thrust that you will ever need. You probably see tons of reviews comparing them to the Atomic Split, which is fine as they are very comparible, but the Apollo is infinately more durable (no panels to rot and fall out) and the foot pocket is more comfortable. I found I can do a frog kick and scull, but certainly the flutter kick is where it shines. It is also much larger and heavier than the ProForce.
The ForceFins are also excellent fins. The ForceFins have a much greater range of fins available. Their
ProForce Fin is the most comparible fin to the Apollo's as far a thrust goes. The Forcefin has a MUCH more natural kick and therefore you can maintain an aerobic kick longer when you need to (ie fighting a current). This is due to the unique foot pocket design of the ForceFin. This foot pocket harnesses the power of larger muscle groups that competitive swimmers use to kick with which increases the physiological efficiency. This inturn minimizes lactic acid production and fatigue, which reduces cramping, not to mention will reduce your heartrate and air consumption. You can read more about this at the
Truth About Dive Fins and
The ForceFin Challenge or over on the Forcefin Forum.
They also make the original split fins the
Foil Force Fin, which is probably one of the easiest to kick fins out there. It again is very comparible to the Apollo, just better. Better because the kick is more natural.
ForceFin also makes the
TanDelta fin, which is the same shape and feel of the Pro, but due to
the stiffer material uses a slower kick frequency to go the same speed, this is THE fin that many scuba divers prefer.
Then there is the
Excellerating Force, the
Extra Force, and a whole series of additional speciallist fins, but you can read about them on the ForceFin Forum.
As a last word, I wanted to add, I am now a animate ForceFin user. They do everything for me, they flutter, they frog, they scull and backup. My current go to fin is the Excellerating Force TanDelta. I love this fin. I can easily say that for all those ForceFin haters/doubter this is THE fin that will convert you.