TBird ..blue or green core??? What's the difference??

[App]

I have red many times about bue and green coloured cores of TBirds in this forum. What do those colours mean? What's the difference between a green or a blue coloured core?

Thanx

[kat]

something we wont have to worry about any more after June or July last year all tbirds have copper interconnect's

blue= made in Germany=copper=good
green=made in Texas?=aluminum=not so good

;D

[Murphy]

... and they taste different!