For what it's worth, (and if you're actually interested in what they are like to fly, as opposed to just which one will get you on to the 'next best thing' fastest...coz either way, you'll have to actually fly one or the other for a reasonable amount of time).
The Beech is a far nicer aircraft to handle, well coordinated and for its weight, has plenty of excess power, certainly when compared to a Dash 8 100 or 300, (200 isn't bad). You 'fly' the Beech, you 'drive' the Dash.
I'm sure that others who've flown both types would agree.
B1900D, the gentleman's turboprop.
That said, it's nice to have an APU, muffin chucker and lav.
