The Qualcomm Snapdragon S3 MSM8260 is an entry level SoC for smartphones and tablets (mostly Android based). It contains two Scorpion cores (enhanced ARM Cortex-A8) clocked at up to 1.5 GHz, a Adreno 220 graphics card and radio elements. Compared to the similar MSM8660, the 8260 does not include support for CDMA2000.
The similar named MSM8260A already contains the faster Krait cores and the slightly faster Adreno 225 graphics card.
The Qualcomm APQ8060A (Snapdragon S4 series) is a ARM based high-end smartphone SoC in 2012. It contains two Krait (ARMv7) CPU cores, a Adreno 225 GPU (400 MHz), a LPDDR2 memory controller (up to 500 MHz). Compared to the MSM8260A it does not feature radio elements like GSM, GPRS, UMTS or LTE (only WLAN and BT). The chip is produced in 28nm LP (low power process) at TSMC.
The Krait cores offer a slightly better performance as the standard Cortex-A9 cores and are compatible to the NEON SIMD extensions.