I've been in contact with Thomas from 'overloud' technologies (who make Breverb), and he told me that the cakewalk edition has the original 4 algorithms in it which emulate the lexicon 480L, but the full version has three new added algorithms emulating the TC Electronic 'TC 6000 reverb'.
So there it is, plain and simple.
I did download Breverb a couple of weeks ago when Sonar X2 was announced to try out Breverb, but i wasn't exactly 'over-the-moon with joy about it (me being a Reverb fan and all), but actually, i can't say that i really put it through it's paces either, so maybe i'll go do that now, but i probably will have to recant my original position about Breverb, especially after watching the Sonar 'Webinar' the other day, it sounded pretty good coming off the back of those strings, so i'll go have another play now and get back to you, just for anyone who is interested.
By the way, i have never owned any version of a Cakewalk DAW, but i am 'very' interested in SonarX2, it looks pretty damn good from where i'm standing; with the new tasty extras and the refinements to the user interface plus all the included pro-channel stuff and the new guitar-amp sim, well, it seems like a no-brainer to me. So unless Steinberg pull one hell of a rabbit out of the hat with the upcoming Cubase 7, it looks like i am about to become a proud new owner of my first Cakewalk top-of-the-line DAW...
I am quite happy with the DAW i'm using at the moment and it has been a great little workhorse which has never let me down, but Sonar X2 just looks to good to resist so i may just have to jump ship and come to Cakewalk island hehehe