Foden and Rashford are better in front of goal, even though Rashford has his periods where he cant hit a barn door.
Foden is better supporting the attack. Saka has good assists this season as Arsenal have been very good, but in any other year Foden beats him despite rarely playing in his best position. He is also better at the interlinking play City's forwards specialise in.
Rashford is more direct and better at getting in behind defenders.
For me, Saka is a good player who will be hyped to the hills for a couple of years before coming back down to earth. A bit like Raheem Sterling was.
They are both better infront of goal, agreed although Saka is improving with that.
Saka is a better dribbler, better 1vs1, better crosser, better with his weak foot, better defender, better IQ, better at using his body, and also seems to be more switched on.
If Saka was as quick as Rashford, i'm pretty sure people would be saying he's a top 5 winger in the world. Whilst Saka has pace he isn't rapid, which is partly what holds him a little back, but the rest of his game is class and only improving.