Well depends on your Jeep use/abuse.
If you are going to go off-road including rock crawling then #1 all the way. Every inch of clearance matters, and since this will be in line with the tires you would be surprised what one inch more clearance will do for you. Also don't think of it as a step but more as side bumper for rocks (hence they are called rock rails
) As you will use them to slide over or around rocks.
If you don't plan on going near rocks then...... do you really need either? But #2 are more steps then protection.
But I still vote #1 as #2 sort of looks like what you have just smaller tube and since you are looking to change, why get something similar to what you have? Don't want to seem like I am talking down to you, just breaking it down as I am unsure of your experience.
Just my 2 cents