If you switch between a standard C chord and G, #3 will make the transition smoother.
#2 is great for electric guitar if you also fret the 3rd fret of the B string. When you have a bit of crunch/gain on this sounds less muddy since we omit all thirds. It essentially becomes a G power chord.
I personally never use #1. I always add the 3rd fret of the B string.
I sometimes play the 3rd fret on the low E string with my thumb, muting the A string, and I fret the 3rd fret of the B string with my ring finger, and the 3rd fret of the high E string with my pinky.
Practice all of them :D
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Pentatonic Speedster
Funk Lick Library A2
Bat Country
Funk Lick Library A1
Tapping: Level 4
Tapping: Level 3
Alternate Picking: Level 2
Find all of my lessons here:
Complete Lesson Catalog