School does matter. The fact that Seneca only accepts top of the class students makes the program very demanding and somehow puts you over some other schools regarding student academic and experience. The fact that students are always working hard with too little time off, it's part of the training towards airlines mostly. Seneca students will be more used to stress situations than many students at Sault (for example), thanks to the time consuming and stressful program they' have been under. All pilots are tested to see their performance under stressful situations I consider Seneca students to have a better training on this aspect.No saying what school is better than the rest, just pointing out some aspects that people need to consider.
I'm not a student of any of these aviation colleges, however, lots of research and talking have helped me figure out the pluses and cons of each program.