If I had to pick one, I’d go for the 73 first. It has a balanced width covering my preferred Rhodes key range. And there’s some extra space on top for an iPad to add your favorite Hammond emulation.
Between the 61 and 73 there’s not much weight difference (and you can get a matching Vox bag at Amazon for about the same price of $70-$80). But there’s another reason to get the 73: it looks way better on the stand. Not saying I don’t love my 61 Vox, though. It’s as sweet as it’s compact.
Off to bed now!