I think Liverpool's attack is well ahead of ours as they have the edge in (attacking) system and players.
Gakpo has scored 16 and 18 goals over the last two seasons. He may be average elsewhere, but he knows where the net is and he's far more influential than Martinelli currently. Maybe we get the best out of Eze but even then he'll struggle to match those numbers from left wing in Arteta's sytem.
Isak is surely ahead of Gyokeres, and I would imagine the only way Gyokeres outscores him is if Isak is hurt. There's a decent chance of Isak being laid up for 10-20 games but they have Ekitike who very well could outshine Gyokeres.
Finally we get to the wonder boys - I absolutely love Saka but I would wager money on Salah outscoring him. We have to hope Saka stays fit (already an issue) while Salah slumps due to PED overuse and/or AFCON.
I don't see a way for us to outscore them as Liverpool will likely match us on goals from midfield too. Wirtz and MacAllister (combined) will likely score more than Odegaard. Rice may claw back some of the goals for us, but hard to say if his ~ 7 goals will come in the league or elsewhere.