Or neither.
A striker will come, I just don't think it is going to be either one of these two. in regards to Dzeko, there are too many moving parts to take place in order for it to happen. In regards to Llorente, Juve have set their price, which in all honesty is a very fair one for a striker who wants out on the last year of his contract. Comparisons to the RVP scenario cannot be made due to Van Persie being a better known name than Llorente.
I have this feeling that the striker will be coming from either the Bundesliga or Russia. Just a hunch, nothing more than that.