Do sport boots or polo wraps better protect my horse?

 There are no boots or wraps that truly offer suspensory support. They can tell you whatever they want to sell you something, but the truth is ... no. Boots and wraps just protect from strike protection.  Now, Top Hand Brand sport boots offer 47x MORE strike protection than traditional open cell neoprene boots can offer, but we can only do so much.
I know every brand out there has a suspensory strap and you can pull it up and do the best you can, but when it comes to a 1000# horse with the load bearing of twice that per leg at the gallop, not taking into consideration of the rider weight, tack, and ground conditions ... we are talking 2,000# versus neoprene. It's just not going to happen.
Plus, 90% of the elasticity and shock absorption

 is actually from the muscles in the foreleg. The remaining 10% is on the ddft.  So your biggest line of protection would be an excellent fitness routine.