I think the general answer is “yes”, whereas the real answer is “you cannot compare them”. Tor is a software package running within your operating system, whereas Tails is a full-fletched operating system.

Tor is a software program running within your favorite operating system (linux, windows, mac), alongside with other applications. Most of the applications you’re using on your pc store information (such as settings, files and configuration) to your hard drive, with which you can personalize those programs. This makes your operating-system unique, because the probability that you install the same programs and use the same settings as someone else on this world is about zero.

It’s important to notice that [“your operating system is unique”] implies that [“assuming someone knows everything about your pc, you can be uniquely identified”]. This causes a (mainly theoretical) threat to using Tor on your computer. However, Tor is designed in such a way that leaking information about your pc (identity) is minimized (in my opinion, “impossible” does not exist). This is the reason that javascript — as well as flash and plugins like silverlight — are disabled when using Tor.

I think this is the main factor why Tails is created. Tails is a fully-fletched operating system that does not store anything for later use, and does not leave other kind of traces on the computer that you use it on. Because Tails does not store anything, everyone using Tails uses about the same operating system, which is therefore not unique. Besides that, all internet traffic that you use with Tails uses Tor.

Because I think Tails is way more a privacy-protecting “overkill” than Tor is, I think the general answer to your question is “Yes”. However, since Tails is an operating system while Tor is a software package within an operating system, I think you cannot answer with a “yes” or “no” in general.