Beyerdynamic also have B Stock on their website at reduced RRP's.No, it's the same headphone. You can check Beyer website for their official lineup. The T1.2 has two color options, and the T5p 2nd gen has this black and metallic grey color, which I love. I wish I picked a similar color variation (ninja black) for the T1.2 when I purchased it instead of the silver one.
They also occasionally go for good prices on Amazon. I bought mine from Amazon for the full price with monthly payments over 5 months.