It's a valid point
@TRAMPER ... My counter (not owning either one and having any personal experience, mind you) is that the Wrappon is ~$600 more than the Laveo.
Looks like they are about equal on a "per flush" basis. Either 50 Wrappon bags or (3) 15 flush Laveo cartridges for $70 give or take.
Our typical trip is 4-5 days, usually Mon-Fri as we try to avoid weekends. I think the 15 flush cartridge would be about right since there is just two of us. Over the long term if it ends up being 25% more cost due to waste that $600 will still take a looong time to equal out for us.