Matchbox RC2

[eluser]zdknudsen[/eluser]
A) You'll have to keep the "application/controllers" folder no matter what library you use. However, in Matchbox you won't have to place anything in there. ME on the other hand, will require you to have at least one controller for routing purposes in there.

B) Both are capable of calling resources from other modules with one major difference. Only ME can call controllers from other modules. Apart from that, it's the same.

Now, on the matter of which to choose, I think it boils down to personal preference. Basicly this is how the two differ
Matchbox
No need to alter codingstyle
Extends CodeIgniter core
Includes routing functionality (e.g. URI /modulename/controller will lead to correct module)
You can split an existing application into modules and still have it work

Modular Extensions
Requires some adjustments in the way you code
An additonal library, no extending of core
No built-in routing (you have to route yourself)
Can be used as HMVC controllers