That's one to many ifs. Either way, the work rate wasn't the problem. Frampton beat LSC throwing over 300 fewer punches in the first fight. LSC incorporated the same boxing style that he used to beat Abenr Mares. LSC even said in his post fight interview that he prefers to use his agressive come forward style over his boxing style, but fought that way because of who Frampton is.
The difference this time around was that LSC was more focused, threw more jabs than last time, and had a plan to fight from the outside using his 7 inch reach.