Which is better for standing all day?

The Birkenstock Arizona. Its cork footbed and arch support hold up over long days on your feet, while the Clarks Breeze Sea is soft but flat.

The Arizona. The cork footbed and resolable build outlast the EVA and TPR in the Breeze Sea, which wears faster with daily use.

Is the Arizona worth stepping up to?

Yes if you want arch support and a shoe that molds to your foot and lasts for years. No if you want something light and soft for the beach.

Which is better for wide feet?

The Arizona, which comes in narrow and regular widths. The Breeze Sea comes in medium width only.

Which is more comfortable out of the box?

The Clarks Breeze Sea. It is soft and flexible on the first wear, while the Arizona needs a break-in period.

Can I wear the Arizona to the beach?

It works, but keep the cork dry. Soaking and sun-drying can crack the footbed, so the Breeze Sea handles water better.

Birkenstock Arizona Sandal vs Clarks Breeze Sea

Buy the Birkenstock Arizona if you want a moldable cork footbed with real arch support and a two-strap fit that lasts for years. Buy the Clarks Breeze Sea if you want a light, soft flip-flop for the beach, pool or quick errands. The Arizona is the heavier, firmer, more supportive shoe and its owners tend to keep it for many seasons. The Breeze Sea is cushioned and easy on the foot but built for lighter use.

Choose the Birkenstock Arizona if you stand or walk a lot and want a footbed that molds to your arch.
Choose the Clarks Breeze Sea if you want a light, soft thong sandal for warm-weather casual wear.

Prices

Birkenstock Arizona Sandal: $24.00 at Poshmark (last seen Nov 11)
Clarks Breeze Sea: $45.00 at Zappos (checked today)
Difference: the Birkenstock Arizona Sandal is $21.00 cheaper than the Clarks Breeze Sea at the latest prices (Nov 11 and Nov 14)