UA 767 GF vs LOT 787 Business class

Hi everyone,

I'm looking at booking some award travel from Europe to Chicago this summer. Which would be a better product, a United 767 in Global first or the new 787 business class with LOT ?

I imagine the seat will be good on both, but in general which has better food and service ? I know LOT has not starting flying the 787 yet, but in general how is there service and food in comparison to UA GF class ?

Thank you so much for your thoughts !