it shows that the only difference is that you need to kill the guy on the basement but im sure its not easy to take him down,i didint actually test trying to kill him.
Viewing post in how to get genocide ending in 0.0.7
first grab gun
go left left right left
say yes
go right left left left
go shack
press act and heal yourself until you have 300 health(it doesn't matter but you need too much health)
press act tire him until him sleep
then spare him
go to dark street and kill weed guy(for basement key)
go to abonded shack
go to basement
press glowing shard button
you made hardest part now
kill homeless guy
go to small shop to kill sleepy guy
and finally go to starting road
finish job