Are slant board squats better than regular squats?
Slant board squats are not inherently "better," but they are more specific for certain goals. If the objective is maximum quadriceps hypertrophy, VMO development, or working around ankle immobility, then squats on GymFit Tech Squat wedges are superior to regular squats because they enforce a knee-dominant movement pattern.

They are also "better" for keeping the lumbar spine neutral for those with long femurs. However, regular flat squats are better for overall posterior chain development (glutes/hamstrings) and functional carryover to sports where flat-ground stability is key.
A complete athlete benefits from both: using regular squats for maximal strength and GymFit Tech slant board squats for targeted muscle building and joint health. The "best" choice depends entirely on the outcome you are training for.