They are both the same stuff. Just Novalsan is the "brand" name per say and more expensive. Regardless, buy in concentrate and not premix as it will be cheaper that way and you mix up your own strengths. You can also check out F10SC. I used to use Chlorhexadine for everything but I have switched to F10SC. I just like the smell of it better. Both are also just disinfectants, they arem't cleaners like a soap.
How safe is f10sc?
Can a disinfectant be used alone or do you also need a cleaner?
Can you use the disinfectant every cleaning week or should you use it every other week?