What if any differences are there between these two? The SD and B.C. are identical.

On the Golds, the partition is moved foward a little more so more weight is retained behind, the rear core is surrounded with a steel jacket simular to a Winchester Fail Safe and the jacket is about twice as thick on the front vs the regular Partitions.

At least on the 250gr 338 Golds vs the 250gr regular Partition.

As a result of a thicker copper jacket and less lead, the Golds are longer than the regular Partitions.

I have used the Golds in 7mm and .338. They perform extremely well, especially at higher impact velocities. The perfect bullet for Dakota, Weatherby, and Ultra Mags.