Forum:Which is bigger?

Hi all. Never posted before but great website and I'm regularly staggered by the intelligence of the major contributors.

Anyway, I struggle comprehending notation after Bachman-Howard and am interested in knowing the size comparisons between:

1. SCG(13) 2. The ordinal where the SGH catches up to the FGH. 3. The Takeuti-Feferman-Buchholz ordinal?