This is totally hypothetical, for reasons you'll soon see, but which do you think would be best in UK quarry (and similar quarry internationally) in a woodland setting.
Here is is my thinking. Both bullets would be soft lead, .620", and have the same nose profile.
'Fast and 'light': 550gr@1425fps
'Heavy and slow': 1000gr@1050fps
So we have rapid expansion, less retained weight, less penetration, and MAYBE more energy transfer VERSUS greater penetration, greater retained weight, more recoil, worse trajectory.
Bit of a fun one so go wild