The Independence beds are around 30” wide. Liberty “twins” are more like 22-23”, too narrow for comfortable sleep for most people.
One solution involves building extensions onto the Liberty benches to support wider mattresses. There’s some work and expense, but it provides a superior result in my opinion because the bed is partly cantilevered over the aisle, leaving more open space. That’s how
Oliver does their twin bed model. It allows you to customize the width to suit your preferences (I’d probably opt for about 27-28”) and to use a better mattress than the thin factory ones. It’s also the only way to get twins in a 16’er, since the Independence was only offered on the 17’er.
Here’s a self-described “Independence” that’s actually a Liberty model modified for wider, permanent twin beds (actual current sale ad). Nicely done.
https://www.fiberglass-rv-4sale.com/...iler-excellent
For comparison, here's a stock photo of an Independence.