Great, yes, there were tons of things deemed more important to Lois and Clark than Lois and Clark's relationship. This is not the case with Wally and Linda. That is the difference.
This isn't really an argument. Wally and Linda started later and got further sooner. Because a majority of their comics were about their relationship when that is definitely not the case for Superman and Lois. When you are comparing them this is one of the obvious comparisons. Wally and Linda's romance was more significant in their comics. A higher percentage of Wally West comics are about his life with Linda than the percentage that Clark's is about Lois.