Cialis:
1. Less side effects!
2. Longer acting (like an entire day and all night)
3. Hard when you want to use it, not too hard when you don't want to use it.
4. Takes longer to start working.
5. I recommend 30mg for serious sessions, 20mg for passive enhancement.
Viagra:
1. More side effects! Mind blowing headaches!
2. Shorter acting (4-6 hours)
3. Doesn't even work as well for me, but maybe it's because the side effects effect my desire.
4. Works fairly quickly, side effects and all.
5. I recommend 50mg. 100mg made me feel like my head was going to explode.
I would use Cialis.
Karma is welcome.