A330-300: MTOW 213T 2 x Trent 700 at 67,000lbs thrust each.
A340-300: MTOW 275t 4 X CFM 56 at 32,000 thrust each.
A similar thrust/weight ratio in the one engine out case. The 340 doesn't need so much thrust, which is why it's popular with accountants. It's ideal for long lean routes.