Advantage/dis
well I can't say that one is better than the other as they both work, they are just optimized for different purposes/uses, I will use a categories that someone once told me. Cat 1-paddle fins, Cat 2- Splits, Cat 3 ForceFin. I will try to keep this as unbiased and objective as I can.
Cat 1 Jets- Short-Stiff Blade, Heavy paddle fins, very negatively bouyant (good for floaty feet), can scull and frog kick with the best of them. Best when used with the frog kick when slow speed, silting, or fine control are important. Overall very good fins for technical, wreck, and drysuit diving.
Cat 2 Splits- Longer Flexible blades, very easy kicking, lots of propulsion, very comfortable, however work best with a tight fast flutter kick, and do not scull or backup very well. Overall very good fins for recreational diving.
Cat 3 ForceFin- Short and Flexible blades, easy kicking similar to Bios, while having the sculling ability as good or better Jets. Most powerful kick is the flutter, but can also perform frog kicks and sculling very well. Bonus- they look cool
If you don't like the fins that you have, try some new ones, give each them a chance for 3-5 dives a piece so that you can make an informed decision. As only you can decide what fins work best for you and your diving style. Hopefully, you have some friends near you that will be willing to share their toys so that you can try a couple fins out. Call your local shops, often you can find a decent variety for rent, or some shops' DM/instructors are willing to let you "borrow" their fins as well.
For opinions- well I have used all 3 of these fins extensively, at least 50 dives with Atomics, 20 or more with Bios, 100+ Jets, and 400+ with ForceFin. I am now a loyal fan of ForceFin, only leaving them to test a new design and see if they are any good