Motorola Defy+ versus Sony Ericsson Xperia Active AN UNDERWATER TXT: Both phones happily survived being submerged during multiple takes (unfortunately, being a family-friendly publication, NBR can't post the one in which dunking technician @CWoodfieldNBR utters the immortal "it's not responding to my finger!" Although sometimes slower, both handsets still work with a soaked screen). While …