They both have similar setups where the father married a 2nd wife and they have evil step sibling(s).
When is the Son Off, is such a strange English title. There are no subs yet still and probably will never have. But I watched it--or most of it at least. I watched it for Bella Du but came out liking the guy too. He really reminds me of the ML from The Romance of Hua Rong. They are both such sweet husbands who really care about their wife.
Ok, I think it's time I place these two together. Thanks to having found The Vigilantes in Masks and it being such a great drama and having many years of drama watching, when I finally found Nirvana in Fire, I was able to fully enjoy and appreciate it and always felt something similar in regards to it. Idiot me didn't know how to use this recommendations thing. The Vigilantes in Masks is like the wuxia version, and Nirvana in Fire is like the political version. Of course, they have many different elements. But the biggest thing that stood out in similarity for me is the main character. They both are very smart and make you feel calm when they're present on the screen--like you just know that everything will be alright as soon as they show up. A kind of hero type of feeling that not many dramas give off for me.
Both have similar wuxia elements, for lack of a better word. Each with a central character that leads the narrative or the team. And each of those characters has strong sidekicks who fight with them. If you like Sword Snow Stride, I highly recommend The Vigilantes in Masks, it is a gem, one in a million. Also a little spoiler, many people believe that Sword Snow Stride although needs a second season, it has a satisfying ending for season 1....just to let you know, The Vigilantes in Masks, has that explosive satisfying ending as well, plus it was great along the way throughout.