Only time will tell how Sebastián Piñera will differ from Concertación presidents in terms of dealing with Venezuela and Cuba. Andres Oppenheimer interviewed him, quotes very bland platitudes, and takes these vague pronouncements to mean Piñera will "push" Venezuela when in fact he never says anything remotely like that. Actually, Piñera makes a huge point about non-interference.
I can have my opinion, but I won't interfere with other countries' internal affairs. But I will always defend, very forcefully, the values of democracy, freedoms and human rights.
What does that mean? Anything you want.