The simplest way is to see if the "Go pro" pop-up at start up appears.
If not, the hooray, you got Pro. Since you already tried out the Basic version before actually buying the pro one (good for you) then just sit back and I'm sure you'll find the differences on your own (basically I don't know them so asking me won't do you any good.)

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iMac G4 OSX 10.3.9
RAM 256MB
LW 4.10.5 Basic
ADSL anything from 3 to 8Mbps/around 1024kbps

"Raise your can of Beer on high
And seal your fate forever
Our best years have passed us by
The Golden Age Of Leather"
-Blue Öyster Cult-