Southpark is certainly a unique crag. You'll find it on the same road as Heise Rock. This concludes the list of similarities.
Southpark offers no single-digit routes, and nothing harder than 5.12b. Most of the wall overhangs about 6 feet in 90. The stone is broken and sometimes loose, and by all indications will continue to be so until the rapture. This place cannot be treated like a gym. Holds break unexpectedly. Pay attention and communicate with your belayer.
The real essence of Southpark climbing is the overwhelming prevalence of open-handed pinches. Dean Lords says "if you're on a crimp, you're off route".
Climbing here is not as technical as other areas. Your main enemy is the concrete in your forearms, not any specific powerful move. Because of this, it's the greatest place to train endurance and finger strength. It also makes the grades fairly subjective.
Watch out for snakes and falling rock. Do not belay directly under the climber. Do not flake your rope directly under the climber unless you like core shots. Bring your stick clip and have a great time.
The area guidebook is Sweet Spots, by Jerry Painter and Matt TeNgaio. Southpark is not included in the current edition but you should buy it anyways. Seriously.
Follow directions to Heise Rock. Continue east past Heise a little less than a mile until you reach a dirt road on the right. Follow this road about 4 miles. You'll see a large sign saying "Wolf Flats". The wall is .8 miles past this sign. You can park in the little turnout directly across from the wall, or in the dirt "lot" about 100 yards past.
Mountain Project's determination of some of the classic, most popular, highest rated routes for Southpark: