Are there any main differences between the 3/4" Premium Extreme Mats and the 3/4" Shock Mats in terms of floor protection? Was looking to protect my concrete slab when doing olympic lifts and was deciding between (2) Premium Extreme Mats or the two-piece Shock Mat which would run about the same price.

In regards to subfloor protection, both the 3/4" Premium Extreme Mats and the 3/4" Shock Mats will give you the same amount of protection. The great thing about the Shock Mats is that the two-piece mat is an interlocking mat, ensuring no movement while doing Olympic lifts and also no need for tapes or glue to keep the mats together. Another great quality about the Shock Mats is that the bottom of the mat has been designed to distribute the effects of dropping the weight through the mat instead of allowing it to pass through the mat. This means better sound dampening when lifting on a second floor and better protection for your subfloor.