Pros of Full Post
Full post clubs are usually very organized, and you would receive an average of 5-10 posts a week. It doesn't clutter the inbox and you never have to worry about someone cutting into the middle of your storyline!
Cons of Full Post
Sometimes it can take a few days for a coposter to return a reply, and sometimes this can cause a delay on the mailing list which means that the club might not see a post the entire week.
Pros of RR
RR's usually receive a ton of emails to one's inbox per week! Responses normally come quick and easy and there's hardly a day that goes by when someone doesn't respond to something that you've written!
Cons of RR
You can be in the middle of a plot and have someone else throw their character in without you really wanting them there! Along with that, if you don't check your email every day then by the time you do you have 25-50 emails sitting in your inbox and you've got to read through them all to catch up with the club.