Golf balls having a low modulus hnp layer and a high modulus hnp layer

A golf ball comprising:

• (a) a center having a diameter of from 1.20 inches to 1.30 inches, a center hardness of 50 Shore C or greater, and formed from a low modulus HNP composition, the low modulus HNP composition comprising:
• a highly neutralized ethylene/(meth)acrylic acid/alkyl (meth)acrylate copolymer having a modulus of from 1,000 psi to 50,000 psi;
• (b) an outer core layer having a surface hardness of 75 Shore C or greater and formed from a high modulus HNP composition, the high modulus HNP composition comprising:
• a highly neutralized ethylene/(meth)acrylic acid copolymer having a modulus of from 25,000 psi to 150,000 psi;
• (c) an inner cover layer formed from a thermoplastic composition and having a material hardness less than the surface hardness of the outer core layer;
• and
• (d) an outer cover layer formed from a polyurethane or polyurea composition;
• wherein the modulus of the highly neutralized copolymer of the low modulus HNP composition is at least 10% less than the modulus of the highly neutralized copolymer of the high modulus HNP composition.