The darker white on the corner of your first picture, will look good with your trim. The white sample, doesnt go well with the trim, and wont look good.

Hard to tell with photos, but probably the darker color ... the truth is it won't really look much different than what you have now.

When we bought our previous house it had a very yellow creamy trim, which just looked dingy. We went ahead and had it repainted. It was pricey to do all the trim, crown and doors, but well worth it.