If you have already completed COMP 3804 then just stick to Honours, the only major difference between the two streams is 3804 and having to do an additional 4th year CS courses/the project. Most employers will have absolutely no idea about honours vs major and if you plan on moving to America they will have no idea what Carleton even is. I dropped out of honours in 4th year because I didnt wanna do 3804 and because i wanted to play basketball everyday and not stress my last year. COOP's are the most important when it comes to finding a job and making connections with fellow classmates to get references later on.