I don't think there is a difference if there is no chance of getting off......... which you would have in a fair trial
If you are killed because of who you are this is essentially the same as the good old Tudor/Stewart standby of an Act of Attainder - which declares you guilty by Act of Parliament and no worries about jury, evidence or even charges...
Judicial Murder of course - but a lot of people would say drone strikes aren't any different