USD$/$EUR $=0,94$

$$ Firm $1$: EBITDA : $$1725$ Mio, standard deviation of EBITDA : $$172$ Mio

$$ Firm $2$: EBITDA : $2325$ Mio, standard deviation of EBITDA : $279$ Mio

$$ Which one is the riskiest?

$$ Firm $2$: STDEV $=12\%$ vs$.10\%$ for Firm $1$