Hello
@Sprite1275
1) I would definitely recommend you test them out before buying. Perhaps contact a dealer that stocks them both and speak to them about returns. For example Focus Optics near Coventry does both Zeiss and Swarowski (
https://focusopticsltd.co.uk/) or in Focus, various locations (
https://www.at-infocus.co.uk/). I've found both these companies extremely helpful and knowledgeable. There are other good specialist dealers around too who I've less experience with.
2) as mentioned in another post I compared the 8x25 Zeiss Victory, 8x25 Swarowski CL pocket and also the Leica 8x20 Ultravid
a) all great binoculars that I would be happy with if there wasn't a choice
b) Leicas were lovely but I chose against them becuase they were
so small, eye placement a bit fiddly and narrowest field of view. For the purposes I had in mind I didn't really need that small. (perhaps for a specific purpose like a lightweight expedition they would be perfect, I understand they are popular with ultra light cyclists etc).
c) Zeiss were excellent - what slightly put me off was that the carry case was quite big. With direct comparison with the others, I found eye placement the most tricky. (Others say differently, hence the recomendation to try out first). Optically excellent.
d) Swarovski - these are what I chose - easiest eye placement of the three by far for me. I do not wear glasses when using binoculars though - I think some glass wearers find that the Zeiss better. I have used them a reasonable amount over the last year or so -- I prefer them over my 10x42 VGA imagic Opticrons, even sitting looking into the garden because the image is so much clearer. I find they handle well even wearing gloves, eye placement fine. Main niggle is that they don't come with an ocular cover (but the new version about to be released does, so will see if I can get one from Swarovski).
Summary - see if you can find a dealer who will allow you to test out before making a final choice - but I suspect if you make a choice without seeing you'll be happy and none the wiser