To gel or not is an entirely personal choice. Neither is wrong. I personally prefer to gel. I like the brighter colors it produces, and I like the fact that it gets firmer sooner and therefore I can cut it sooner.
Lots of people prefer the softer, creamier look that not gelling can give.
You say 2 batches - do you mean 2 molds? If so, gel one and don't gel the other and see what you prefer!
You may get a partial gel - that's when the middle of the log gel but the outer part does not. This is fine too. It will result in a darker spot in the middle where the soap gelled, but that is only cosmetic, the soap is fine. A lot of us hate partially gelled soap - I think because it represents a "failure" to control the soap.
If you see cracks start to form along the top of your soap, is the early stages of the volcano. Stir the soap to release the heat, and/or move the soap to a cool/cold spot. Personally, I would stir rather than putting a potential soap volcano in my fridge or freezer. If it is cool were you are, you could take the soap outside.
Thanks Dixiedragon , I meant 2 molds indeed , very good advice will go for 1mold for each one and see which one is better!! I do prefer to gel my soap but I was in doubt with this batch having AC in ,so I thought it may be different with it.
Here the 2 molded loafs with AC soap !