Too long is too much work IMO. I let my long val grow across the top of the tank & sometimes trim it but it's a PITA & my tank is 20 inches tall...Red plants may not be so red or red at all in lower light or no co2 &/or lesser ferts...That 1 might be worth a try at Modernaq...hard to say, I did read of a short red corkscrew on a plant board. I would beware any that say "jungle" val anywhere in the description (like Leopard), that to me says tall!
I think Sprinkle's val sounds like what I read about "mini twister" 4 inch except hers is not twisted, more like I remember of my short mystery val.
Val asiatica biwaensis has synomyn of tortifolia but there may be more than 1 kind... I had it (or similar) in a 12 inch tall tank I'd say 8-10 inches tall.
There seems to be much confusion over the names. Sometimes all you can do is try 1 & see if you like it in your tank. You can always take it out, give it away or see if your lfs will give a small store credit...or compost it.