i can’t decide what restaurant to pick.

Id go with the better food.

I agree with Samantha and would go with better food. If the food at the place with the patio is just "meh" your guests will remember that more than the environment.

In regards to the 2nd option, you can certainly personalize and brighten up a windowless room using decor and lighting. Opt for white or lighter table clothes which will highlight your centerpieces, add strategic candlelight (real or battery-operated), even bring in diy colored uplighting for texture and drama. Maybe one wall could be used for a slideshow of pics of you and your spouse. To add flow, you can configure the tables in an interesting pattern for your intimate party of 45. There are many ways to make your reception venue your own without compromising your vision. Btw, many hotel ballrooms/ conference rooms and romantic restaurants are windowless. Best wishes!

Our restaurant will be kind of dim and dark as well but I think you could definitely spice up the space and take advantage of the delicious food!

Consider adding white linens to the table (maybe ask the restaurant if they can provide some or have a vendor they recommend that you rent from) and some small bud vases and taper candles!

I would go with whatever space you like best. You'll have the photos to look back on forever, and as long as the food isn't terrible there, it won't make too much of a difference!

I would rather my guests remember the overall ambience and experience of the reception than what the food tasted like.