Hey Miguel I have the golite jam2 and the original mariposa and I understand your doubts.
In my personal opinion (and with my terrible grammar) I prefer the mariposa over the golite for one single reason I believe that the most important feature in a pack is the ability to carry as much weight as possible on our hips and the mariposa is one of the lightest packs with a useful hipbelt and the carbon fiber stays. This point is important because I read frecuently that with lighter loads, stays and belts are less useful ¿?
I never been capable to understand this because I used to carry a sub 3.5 kg (quite light i think?) base weight sometimes less ..(between 7.5 and 6 lb) and yes, you can carry this load witouth hipbelt .......but.... what happens when you add two liters of water and 2/3 kg of food ? (my typical load in a three days walk).......3.5+2+2,5=8Kg (17.64 lb) and with this load .. stays and hipbelt are a good option.
While is not perfect I can carry quite heavy loads with confort, and the 2007 model improves some aspects over my pack.
For general use (one or two days) I find this pack too big (I prefer the golite size) for that reason Im tempted to buy the miniposa (im resisting the temptation until now, arf!) for that reason fi you are happy with the golite size the miniposa must be my recommendation.
Well that´s not exactly true, why? Because you write that you want the pack for ocasional international travel and crag areas..............Meeec ..... we have a little problem here, I can´t recommend the mariposa for travelling and craggier areas .......because i tried both uses and unfortunately i find the pack too delicate.
The spinaker cloth is not designed for this abuse.
When I travel by plane I used to carry the pack empty as hand luggage or in a duffle bag, (as in the past TMB where I carry a tent remember ;-)
And in craggier areas i caused some holes in the pack with minimun friction with rocks. For that reason I use my Jam 2 in craggier areas. If you pretend to use the pack for travelling and cragging you must buy the mariposa plus (and I´m not sure if the stronger fabric will be adequate enought for that use) but as i told before I find it too big for short trips ...
¡sh..it! nothing is perfect. :-(
My conclusion is................. that the winner is ...................
¡the miniposa plus! .....................But unfortunately is not in production ....... :-(
but if you have one artic pack (use it in long walks) and a jam 2 (use it in craggier areas) buy the miniposa ........try it ..... and if you are happy with .... plan to buy a mariposa plus next
Anyway ..............remember one thing ...........Its REALLY difficult to find the perfect pack ...
I tried dozens ..nowadays i use one berghaus cyclops lite, one crux ak 57, one mariposa,one golite jam2, one marmot eiger 35, one GG wishper (with belt, of course) and I would like to buy more (artic pack, miniposa, cilo, mchale......) all excellent packs but I still dream with a mixture of all ............ ;-)