Currently to produce lab grown meat they still need a fair amount of biological material for input into the process. So while it does appear to be the lesser of the two evils, especially from an environmental perspective, it's not a purely ethical process. So I'm not sure how many vegetarians/vegans would be convinced to incorporate lab grown meat into their diet at this time.
What's the worst company ever. Period.
Nestle? Spectrum? Some random company nobody knows about?