I have both too, for your intended purposes I'd go with the Whelen, but, 320 grains at 2400 or 250 grains at 2600, boom, dead, boom, dead, they both work exceedingly well at everything I've pointed either at, and both provide equal accuracy.
I'm a Whelen guy, with a 700 CDL and 7600. Ain't nothing I'd hunt with a Whelen I wouldn't with the x62 and vice versa. Both very versatile cartridges.