Aether 70 vs. Bora 65

I'm trying to make a decision between an Osprey Aether 70 and Arcteryx Bora 65 both in size Large. theres only 3 L difference and the cost isnt that much of an issue. I plan to use this for 3+ day trips in ranging terrain. Any observations/suggestions would be appreciated.

O and im lazy about putting on rain covers, so if either deals better with rain without the cover. thanks again

I had a Bora 80, which I didn't like. It was just too heavy and really didn't fit me right-the belt was way too stiff for my shape (skinny with no hips to speak of).

I have only tried on the Aether 70 in REI, but it was lighter and fit me better.

Either one seems well-made; the Bora might be more abrasion-proof, but I don't beat up my gear, so that wouldn't matter to me.

I have an older Aether that I haven't given up. I've always been intrigued by the Bora (I really like the Arcteryx gear I do have), but always been happy with my pack. Maneuvers well while scrambling, nice features, nice materials, but still light.

Hello.

I have a Bora 80, from before they started using waterproof zippers and lighter fabric. It is a very good rucksack which moves well with your body as you climb and conforms to the back comfortably. But measure your back correctly according to their webiste, as it's easy to get your size wrong by trying them on in the shop unadjusted or measuring your hips to vertebrae inaccurately.
Arcteryx make hard-wearing packs but they are sometimes heavy. The large hip belts are a benefit if you carry a traditionally heavy load, otherwise they may be a bit excessive. Adjusting the shoulder straps to lengthen the pack as you go from a down jacket to a t-shirt, is easy as well. The top is a bumbag if you take it off - do you call them fanny-packs in the States ;-) ?
In the UK, Osprey are just as well respected, perhaps more so, so you cannot go wrong with these brands.

Waterproofing is ok on the non-seam sealed packs and I never bothered with pack covers. I find that a sleeping bag in two light stuff sacks, and clothes in one, is all you need - everything else can get wet if it wants to and in prolonged rain it will.
70 litres is more than enough for three days but if there is a lightweight 80 litre out there which compresses well, you may never have to buy a larger pack for extended trips and you can get a 45-50 for summer weekends and winter days.

All the best.