I feel like wearing a basic knit top with either is the expected move, so I'd try a different top: a loose white/blue stripe linen button front, semi tucked, would be cute with the first pair, and a pair of metallic Birks or European type sandals. The second is more fitted, so I'd echo that with a drapey top, maybe wrap or faux wrap, like the sleeveless Vince Camuto ones Nordstrom had last summer, and a pair of current sandals, maybe something more covered, like the Steve Maddens with the peeptoe and chunky wooden heel.