Registered User

Will I have to install Comodo version over registered version ?
Because signature updates will come from a different server ?

As a paid user of BC I wondered about that too.

Not really sure but you can read this…
Comodo Aquires BoClean! | Page 4 | Wilders Security Forums and go to Post #93

No. Please read about it here:
https://forums.comodo.com/index.php/topic,7549.msg56563.html#msg56563