You can't compare the two as of yet because Lukaku has play 20 minutes in the Premier League, whereas Welbeck has more experience under his belt. In a couple of years time Lukaku will give Welbeck a run for his money.
When Mata+Torres was on the field, there was a nice link up between the two. I just hope that they get more playing time together. OT: Lukaku played surprisingly good, very mature.
We all know Lampard is a guaranteed starter, we need to stop relying on him and give Josh a chance. No disrespect to Lampard but he is the first choice penalty kick taker, hence why his goals scoring record is so high.