Yes, Speer changed the name to avoid the confusion between the old Gold Dot bullets intended for hunting purposes and those intended for SD. I still have some of the older Gold Dots that are now packaged as "Deep Curls" and the product numbers are the same. While a SD projectile may work well on varmints, I would not want to use them on deer sized and larger game, since those bullets shown by the OP, are also designed for SD expansion from much slower calibers than the 6.5 PRC. Speer's website shows the bullets shown in the OP as SD projectiles, and myself, would only consider them for that, especially with all the other, much better options available. Speer's Hot-Core bullets in that caliber and weight, are a bonded bullet, just like the Gold-Dots. That is what I would try if I thought there might be a velocity difference from using a bonded bullet. FME, accuracy and terminal performance is much more important than a few more feet per second.
Speer does claim in some of their manuals, that one should only use their proprietary recipes for their bonded bullets. In many instances those proprietary recipes are the same as other non-bonded projectiles in the same weight and profile.