What's the Difference Between Compression Garments?

My doctor asked me to wear spanks for 6 weeks after lipo/tummy tuck. He alo provided me a Velcro binder that wraps around my stomach for the first week post op. he wanted me to switch to spanks after that, which I assumed was bc you can see the spanks when I start to go out, but the binder is large and I wear it comfortably outside my shirt. The spanks are hurting my stomach badly so I took them off and put back on the Velcro wrap around. Is that still considered a compression garment?