In reply to Fiskavaig:
I havn't tried either but going by Rabs description of the jackets they say offering exceptional levels of warmth and water-resistance, featuring Primaloft£ Gold synthetic insulation about the Photon Jacket, the Jacket has less stitch through panels than the Rab Nebula so will probably keep the water out better other points are the Photon has adjustable cuffs to keep drafts out better than and more durable than lyca cuffs, two way front zip also better for keeping the heat in.
The Nebula looks ok if you want a slightly lighter and cheaper jacket but no idea on durability of the new isulation or it's performance and looking less warm would also make the Photon more attractive to me, however like stevieweesaxs107 above I don't like some things about Rab stuff, the jackets are cut very staight in the body so they usually end up tight in the chest and arms if you have an athletic shape. Montane do have more shape in their jackets I am told and the Montane equivalent to the Photon would be the Ice Guide with Primaloft Silver eco
https://www.montane.co.uk/en/men/clothing/synthetic/ice-guide-jacket so interested to see a comparison if anyone has tried the Photon and the Ice Guide.
UKC have a review of a Montane Ice Guide 2.0 but that Jacket had a mix of down and sythetic fill which stevieweesaxs107 mentions above however their is a Black ice which is all Primaloft and shown in the link here.
Post edited at 12:20
