OEM have to modify their product when branded to Kirkland Signature .
The Kirkland Signature should be at the minimum , comparable to the name branded product and in most cases are a little better than the name branded products. I suspect the Chrome Hot 55 is very similar to the Chrome soft 58.
The Kirkland Signature stirred up so much wave, not because it's a superior golf ball than the rest but because they could be compatible in the premium golf ball class and selling below the second teared pricing. once the edge of the low price line is gone so would the magic.