You'll have to get inside a 19'
Escape and see for yourself. Is there enough extra floor space, cupboard and storage space to make a significant difference? Only you can tell. If there really is, then go for it and don't look back.
I've been in an
Escape 19 and it felt good, but I wasn't thinking about it in the terms you are. Only you can picture where things (and people and pets) will fit into the interior and how helpful (or not) the square footage will be within the confines of the layout.
Now, if it were only a perception of space that you were after, then I could say yes, the 19 will feel bigger. But I doubt that's your main need, right?