2:28 p.m. on May 13, 2012 (EDT)
The Losi is a 3 season model(Allak 4) so we are talking about 2 different animals here w/different intended purposes so its kinda hard to compare the 2 but I will give it a whirl....
The Alti Storm would be a better comparison being it is a 4 season model but alot of what I will mention in regards to the design attributes will carry over to the Storm as well...
Kind of an apples to oranges comparison but here goes.
The Nemo Losi(and Storm)is an inner 1st pitch tent. The fly goes on separately as opposed to the Allak goes up in one shot(its just a larger version of my Soulo.)
Plus with all of the mesh on the Losi spindrift sandwiches would be a big concern for me but this is dependent upon when and where ya use the tent.
I would think as they are shipped or "out of the box" that the Losi would offer a bit more flexibility in regards to warmer weather conditions being its is more suited for warmer weather by design(mesh & better air flow from the fly not going completely to the ground as it does on the Allak) and you can pitch it with just the inner straight from the manufacturer.
If you are getting hammered with driving rain, sleet, so on and so forth setting the Losi up might be a more time consuming pain in the rear end which will leave you as well as your gear exposed to the elements for a longer period of time being it is set in multiple steps.
Wind can make attaching the fly fun too. I have flown more than my share of kites over the years. :p
On the other hand as I stated above with the Allak everything goes up in one shot which will result in quicker pitches plus when you get the tent up the inner will be dry.
The trade-off with the Allak is that you lose a bit of flexibility as it come from the manufacturer being you can pitch the tent outer only but in order to pitch just the inner tent only one would have to drop $26 for the poleholder kit which will then let you achieve an inner only pitch.
If ya want you can also snag up a mesh inner for the Allak at $205 then combine either inner with a tarp and have a truly year round shelter.
But as I have stated this does come at a price.
On the flipside with the Allak you do not have to have the vestibules staked out in order to utilize them as you do with the Losi.
I could go on and on but with that being said if the op is going to be in wet/rainy/mild wind/mild snow either tent will probably be just fine; it is more a matter of preferred convenience in regards to the different type of pitch techniques/flexibility(level of protection)these 2 different brands offer.
I think all of you get the point w/o me dragging this out and stressing your eyeballs too much lol.
Its all about trade-offs(as with any other type of gear that is out there.)
On a side note:
I do like the Moki, and the Isopod(kinda reminds me of a big caterpillar.)
I have also had my eye on the Go-Go Elite for sometime.