Hllo everyone!!

I was looking at the forum and though maybe some of you could help me on choosing a new backpack.

I'm looking at the High Sierra 40 and 45. but I can't see what's the difference between this two. I was also interested in Tangent model but it looks to me that it's not as strong as the Hawk ones.

Would this bags would be enough for a week of clothing only?

Thank you very much for your help!! : )