Backwards Compatible Vs. Non-BC PS3

I've done some research and haven't really come up with much.

My question is just what it states above.
Now with the PS2 Classics so that any CFW PS3 can play PS2 games. What does (If anything) the 60GB
hardware backwards compatible PS3 have over the slim PS3s or the non-BC PS3s. Besides being able to play original disk PS2 games.

I figured that a BC PS3 would have more compatibility then a non-BC PS3, but I cannot find any information or even if there was backup loading
of PS2 games pre dating the PS2 Classics route.

I can either drop $500 for a never opened 60GB BC PS3, or buy a slim PS3 that is on or under 3.50 for far less.

Thanks for any information/help.