Some real pics are needed so post them here in a comment DO NOT start another post.

Do you have cabinets near the trim on that back wall? Or is it just an empty wall? I think it also depends on the style of your home/kitchen. Option 1 would work well in a modern setting, while Option2 would look better in a more traditional setting.

I think you can use wood trim, unless it's a sink where you're constantly washing dogs. I wouldn't expect there to be that much water on it.

No cabinets on wall. Modern look.

Case and trim please. More formal always looks better.

Thank you for the feedback

I did a casement window w/custom walnut trim and tile butted up to it. I applied a good urethane sealer on it. water doesn't hurt it.

I notice in your pic you have the 4" backsplash. are you not doing tile?

If you are doing tile, don't do the 4" piece, and take the tile all the way up:

or take the countertop all the way up like shown here. have them cut around the window on the inside if possible.

This is nice w/the little shelf ledge on either side

doing any open shelves?

Wow - nice set of photos. And your window looks great! On yours, you did not bump the window out, but rather trimmed the sill back?