The great advantage of Tor is that you do not need to trust anyone – your internet use is completely anonymised. However it is very slow, and largely as a consequence of this, it is not suitable for many of the most popular activities people want to use VPN for, such as filesharing and streaming geo-restricted media content.
As long as a trustworthy no logs VPN provider is used, then VPN is a very secure, consumer oriented privacy solution that provides much greater performance and flexibility than Tor can offer.
If, on the other hand, you are a mafia whistleblower, or a dissident living under regime in which it would be very dangerous to be caught performing certain activity (such as writing political blogs), then Tor is the safest solution.
Just remember that there is no such thing as a 100% guarantee of anonymity, whichever route you take. There are always, at least potentially, loopholes in any security arrangement, and individuals often give their true identifies away through patterns of behavior, unguarded comments made while on-line, or any other number of simple and not-so-simple mistakes.