You did not make a 1:1 copy with the Lite-on, the density will be different if checked, and you would not be able to make a copy of that copy due to this.
If you read
here you'll can read about the Premium's unique ability to copy Securom New 4.8
The belief that Plextor will release a f/w that will render the Premium useless against Safedisk and prevent downgrading is unsubstantiated.
There was only one incident which was similar to this - the Plextor 12X wrote perfect EFM bit patterns with original f/w then this ability disappeared in an update.
In all other drives this has not happened - and on that, it would be pointless giving the drives this ability in the first place in subsequent new drives.
Using WinRAR to protect your files on a cd is inconvienant to say the least - for example, having to copy files to HD before use, time to decompress etc etc along with other logistical problems.
Yes the Plextor can handle CDS100 - in addition, Plextor drives do have a far advanced audio circuitry allowing for better ripping which is nice.
I've just giving the other side of the coin, Plextor is well reknowned for quality products, and this reputation is well earned.
Lite-on substitutes quality to cut costs, this is evident by the fact that many of the drives can be upgraded to a faster drive via a simple firmware update as they use the same chipset.
Lite-on's are great for a cheap drive that will do it all (almost), but it is undoubtedly of lesser quality build than most other drives. The Plextor support is second to none - have a problem with your drive within two years of purchase and they will send you a brand new one on receipt of your old drive. Customer's often get a new drive within a matter of days, no quibble. I'm still using my Plextor 24X after burning over 10,000 disks at least.
au revoir