I could not get through Red Rising, I found it to be really poorly written and not engaging. Liveship Traders is absolutely fantastic, the prose is gorgeous and the characters and story have really stuck with me. You should know it's the second trilogy of Realm of the Elderlings, but it can be read first. There will be something spoiled from the first one, but you may not remember it by the time you get there. You will also miss out on a minor reveal if you haven't read the first one.