I ended up trying both the AA and CX showers (was a long layover!). I think AA slightly had the edge
The CX showers looked a little fancier - longer room, walk in shower with dropped floor area, partial glass shower screen, stone effect wall etc. However, that meant that about half the floor and shelf ended up a bit damp from splashes from the shower. Also, the shower wouldn't go quite as hot as I wanted.
The AA one had a normal shower tray you stepped up into, decent sized shower cubicle, no risk of getting the floor / nearby clothes wet, and the water went up to nicely hot!