Well I don't know about the other differences between B3 and G0, but:
http://www.intel.com/design/pr...or/specupdt/315593.htm
Intel FIXED 35 CPU bugs (errata) in the G0 that were problems in the B3.
Though in the process of doing that they added at least one known NEW bug
in the G0 that was NOT a problem in the B3, and I'm sure more bugs
may be found in the future.
And, granted, MOST of those errata that are FIXED in G0 and BAD in B3 are probably
things that aren't TOO likely to cause problems for most people in the real world....
BUT a few of the fixes in G0 are quite significant / important in various not too
unrealistic circumstances, so I'm quite glad to see they've made them!
FIXED in G0, but defective in B3:
ak6
ak20
ak21
ak22
ak23
ak30
ak31
ak37
ak38
ak39
ak40
ak41
ak42
ak44
ak47
ak50
ak55
ak56
ak57
ak66
ak69
ak70
ak72
ak75
ak79
ak83
ak92
ak94
ak95
ak98
ak101
ak102
ak105
ak108
ak109
PLANED FOR FUTURE FIX YET STILL UNFIXED IN BOTH B3 and G0:
ak8
ak10
ak16
ak33
ak43 (is this as bad as it sounds?)
ak91