Samsung Galaxy J8 Plus again listed on GeekBench with Model No. SM-J805G with Snapdragon SoC. However, it was previously listed on GeekBench with Exynos 7870 SoC with SM-J800FN model number.
This may be a Plus version with Snapdragon 625 SoC and more memory. According to listing this new Samsung Galaxy J8 2018 is powered by Snapdragon 625 SoC coupled with Arm Cortex A53 processor clocked at the 1.6GHz frequency. The previous model was listed with the 1.6GHz frequency with same Arm Cortex A53 processor.
The phone runs on Android 8.0 oreo OS, also has 4GB RAM and 64GB internal storage, where previous one was listed with 3GB RAM and 32GB internal storage. There may be two different version with different storage.