Oh I didn't realise that
That's the confusing part. The 600 I know I have is tight to get around, the "650" I'm told I have has plenty of clearance either side.
According the the sales patter from the broker it measures a beam of 2.5m and 6.6m length which supports the 650 claim, I've not checked it myself yet though! I guess the best thing to do is line them up and see what happens
Musical boats tomorrow then