I have flown both types and I find the sovereign more demanding than the 300. Avionics not intuitive on the Sov, Systems integration way better on the 300, flying characteristics way nicer on the 300. Flies a little further but is the north atlantic that much of an issue?
And dont get me started on cockpit size, the sov is sort of a iron maiden.
Want my Chally back buhuhuhuhu... how much is 35k after taxes for a non married lad in the UK?