My Norge amp is with speaker protection circuit. They have started giving this protection circuit from few years. I have no idea about soundking but I think as the videos of you tube depict there is some fuse protection at the back near binding post (model SK2500 etc)To the best of my knowledge* Ayima is a Chinese Class D amp manufacturer while Norge is a Class AB amp, so no direct comparisons here . Its "Efficiency with high Wattage numbers" vs "Quality at moderate Watts".
Sound King is also making Class AB amp, but at a cheaper price point than Norge. Didn't see any speaker protection circuit in both SK and Norge. But, I have read somewhere that Norge offers spk prot. ckt. as an addon extra cost(1500 Rs)
*I have not personally auditioned any of these amps