The AL-star is a little bit heavier, and it has a different feel in the hand. The body is a little fatter and cooler to the touch. But as said, it is more fragile. I don't use mine outside, I prefer a Safari for that. The AL-star does feel more premium and the smoke translucent section is nice. It has a different feeling than using a Safari, the Safari feels like the little brother.
For collecting I prefer the Safari, since they are sturdier and I can use them outside without fear. I have two AL-stars, sold two I had because I realized I could get more money for them (discontinued editions) and they paid for other pens. I didn't want pens of value being stored or rarely used at home. So I recommend getting one or two AL-stars of colors you really like, and they could be great pens to keep inked at home with some colors that you love (and better, that match them) and pick some nice Safari to use outside if you need to. I feel these pens are hard to have only one so it is better to rationalize things a bit. But I can't argue against collecting Safari colors you like, they are useful simple pens that will last.