Because inside zippers "take away" space, so I want a main compartment without zippers and pockets right?

1 is 56x28x18, 35L. 2 is 53x32x22, 40L

Hi all!

I need a new travel backpack but I'm not an expert. I need it when I travel for 3-4 days, but I want also to use it as a "daily" backpack when I am away for just a day but I have to bring more things that usual.

So, I was looking for something as type 2, because has a more "normal" look and it isn't "weird" to carry, but people have advised me against type 2 and told me to buy type 1, without telling me why. If type 1 is definitely better than type 2, I can ignore the look and just buy it.

Can you help me please? Thanks!