The difference between Powerline II and Powerline+ II is just the exterior material of the cable. For Powerline+ II, the cable is braided with nylon. For Powerline II, the cable is made of Thermoplastic Elastomer (TPE). Both cables are still strengthened with bulletproof fiber.
Powerline+ II series is also the successor of the Powerline+ series in which I have the Anker Powerline+ Lightning Cable.
Anker Powerline+ II USB-C to Lightning Cable retails for US$21.99 (S$31) on Amazon and is available in Black and Red. For each color, two lengths are available, 3 ft (0.9 m) and 6 ft (1.8 m).
On 29th July 2019, Anker has a Gold Box Deal on Amazon where the cable is just going for US$15.39 (S$22) for Black in 3 ft (0.9 m). Direct shipping to Singapore costs US$4.64 (S$7).