rar vs unrar - what's the point?

[Spidey]

eix tells me that the website for rar is rarsoft.com, and for unrar is rarlab.com. I'm pretty sure they're mirrors, altought I haven't checked with whois or anything.
So, what's the point on having these two on the portage tree. The version numbers are different, which could indicate that they are really different projects, maybe based on the same RAR lib, provided by RARLab. The linux version for RAR, on their website, is 4.10 beta 4. None of those have this version available.

So, anyone knows that are these two packages?

[John R. Graham]

For this type of question, you need to learn to read ebuilds a little bit. A quick examination reveals that

• rar is a binary (src_compile() emerge phase function is intentionally no-op'd), available for only x86 architectures.
  
• unrar is compiled from source and is available for all architectures.

More examination would result in more discovery.

- John
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I can confirm that I have received between 0 and 499 National Security Letters.

[ppurka]

unrar is opensource and independent implementation which can unpack rar files (but iirc can not create rar files). rar is the closed source implementation which can do both.
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emerge --quiet redefined | E17 vids: I, II | Now using kde5 | e is unstable :-/

[Spidey]

Ops, my bad in being lazy and not thinking about reading the ebuild. I've been fooled by most binary packages using the -bin suffix.
Thank you for the clarification. I'm sticking to unrar then.