Cho did his plan fully, altough, just as Elliot, his end was unhappy, lonely and sad. Elliot rodger had planned to a more shocking and violent rampage but he could not, the sorority house he planned to shoot at was locked to him and overall he acted by impulse when he knew that his plan failed, so he started the random killing spree; the asian guys he killer by knife angered were not saints, they did not liked Elliot rodger, and his other victims were random, which is typical, but nothing impressive or impactful, his impact was due to his online presence at youtube. Overall, i think that Elliot rodger in general had more chances and opportunities to get rid of inceldom if he actually did more plans around the world, instead of fixating on getting laid with blonde girls from his area, while i think that Cho was truly doomed.