I wouldn't even compare the two,
The only commonality between the two is that you'll need to get experience with both of them.
A degree usually means outdated knowledge, yeah sure, you can do research, but in 4 years, will you remember any of it? the chances are unlikely.. With a certification that you're required to renew it demonstrates current knowledge that is up to date with the field.. If you don't want to enter the networking sector then the CCNA will be near useless.
If you're so indecisive about it, then why not do both? Sure you'll have a few months delay for achieving unless you really have time to spare.. If you do the CCNA full time, then it shouldn't take you longer than 4 weeks, if it does, then you really need to understand the content better.
My lecturer has a BSc in Philosophy, he got his CCNA after university and he worked in network/security consultancy.