I haven't found a Stern LE/Premium worthy of the extra cash over the pro. Having owned both a Premium and Pro AC/DC, I thought maybe that one (until I owned the Pro and actually liked it more)
ST pro is plenty of game for the money, and not even for a second while playing did I ever think ''gee, I wish I spent the extra $$ for the premium''...
With great code now, many people will have a challenging time getting to the end. I have mine listed for sale in the market, and honestly don't care if it doesn't sell.
Just my thoughts,