The direct competition for the UD9 is Rampage III Extreme, Big Bang Xpower (not 4-way) and X58 4-Way Classified. R2E is an old-gen X58 board optimized for Bloomfield.
i think it's more UD9 vs EVGA 4WAY board
UD5 or 7 rev2.0 is the board to compare 1:1 to R3E & MSI pretty much. Tuned for GT and no nvidia chips at all.
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