My comparison of the differences:
0x0d260007
64mb bios allocated
34mb framebuffer
21mb cursor bytes
1536mb vram
1953hz bcl
1953hz max bcl pwm
framebuffer index 0, 1, 2, 3
port nibble: 0 5 6 7
pipe attribute: 0800 0b00 0b00 0300
connector type: lvds, dp, dp, hdmi
connector attribute: 3000 0000...