OK. I can see the specs for the Hallberg-Rassy 31 Mk1 show it's a bit bigger (a few inches)in all directions than the Hallberg-Rassy 31 Monsun. And the Hallberg-Rassy 31 Mk1 has the nice
teak deck.
But the
interior plans for these two designs on the HR website look... well, identical.
Are there any other key differences?