I don't double mic guitar cabs too often, mainly 'cuz I always end up liking one of the mics/tracks way more than the other...

...so then I get rid of the crappier track, and then play/record the part a second time using a different guitar....and using the same, one mic I liked the most.
That way...I don't need to mess with EQ to make them sound different since they do on their own, and because they are two different performances, I get less phasing issues.
I can pan them any way I like...even hard L/R...and there's no need to add delay to "separate" them like you would with a split/doubled track.
Or...if it works for the song...I will track the same rhythm guitar part a second time using an acoustic guitar, which can sound really nice against the electric if you pan them apart.