I love the 602's stock, the wood grain at the butt is interesting, and you seldom see the contrasting forend tip on one of their classic stocks, its more often encountered on the Monte-Carlo. My own preference would be to have a standard trigger on both. Its nice to see that MPI kept the open grip and low comb. My McMillan's closed grip required me to add a knuckle deflector behind the trigger guard, and it's high comb forces me to mash my cheek into the cheek piece when I shoot with irons, and it rattles my teeth when I press the trigger.
I disagree that you wouldn't see the advantage of the Lott chamber in a 20" .458. The modest bore capacity suggests you'd still make about 2300 fps with a 500. Frankly though, a bottle neck cartridge like a .458 Ultra (.460 G&A) is preferable in a bolt gun and produces similar ballistics, 2400 fps from a 24" barrel.