To provide some balance to the ad by Username5445…

I can’t compare features as I’ve never used LW, but from a very quick look at their webpage I noticed the following things that would be complete deal breakers for me…
You can only access your writing on LW if you have an internet connection

Your access to data looks to be dependent on LW remaining solvent

Plus, of course Scriv is a one-off payment of £47. LW is $10 a month forever!