What other WA lenses do you have?
Those both seem really really tempting! But due to their price, I will stick to the Samyang 14mm and DA 21mm for a while longer. Yes, both of these have noticeable distortion, so they are not perfect for architecture (even though you can fix the distortion at a low FoV cost in Post). But I like them both. Samyang is super sharp, and DA 21mm just has amazing contrasts and colours (plus, full automation).
Originally posted by Echo Eric and ability to accept screw in filters of the lrix weights just as heavy in my mind
I think alongside making lists of what the lenses offer you should make a list of your
needs and
wants. WR is nice, but is your camera WR? Do you ever go out in poor weather? Do you live in a place or travel to places where WR is needed? Lens ID is nice, but how much does its lack really bother you? How important are filters in your experience? Do you have a good collection of filters, do you use them regularly? Why, what do you get from them? You should ask yourself this kind of questions to narrow down your priorities
I don't have personal experience with those two lenses, but I do like UWA lenses in general. I don't really use filters and I don't need WR (even though I've traveled to various places). I would probably go with the 12mm as my 'only' UWA. But I would get the 11mm since I already have 14mm. That said, since I have the 14mm I really don't think I need any wider. It gets awkwardly wide. To first time apsc UWA I usually recommend the Samyang 16mm f2. Fast aperture, sharp, I think it takes filters, has auto-aperture, super wide but not awkwardly wide. If I didn't have the 14mm and had a budget, would go with the 16mm now and probably wouldn't bother going wider.