Recommended for people with low/fallen arches/flat feet with pre existing joint pains or people with mid arches who want serious protection and added balance and primo protection. This is the ultimate joint support. 100% satisfaction guaranteed. If you don't have pre existing joint pain, the kingfoam orthotics should do the job just fine and are excellent orthotics The difference is that Gamechangers have a very firm custom arch while kingfoam orthotics are more dynamic. The very firm arch is necessary to fully support the arch which then keeps the knees fully aligned. Gamechangers will also give you more power, stability, endurance and balance.