I stand corrected as regards the number of autopilots on the A320 series-- I had always thought it had three. (you can tell I've never flown AB types!)
However, ALL A320 series a/c do have a three channel a/p and the ability to do single engine autolands. From my own observations however less than 10% of all 737NG aircraft have the Fail-Operational autoland capability and the ability to do OEI autolands. The general advice has always been to use Flap 40 when conducting an autoland in marginal conditions as the chance of seeing the required lights at DH is much greater. Additionally any who, like me ,have conducted practise auto-lands in limiting cross-wind conditions will have come away with respect for the robustness of the 737 landing gear! (It is possible to apply some manual rudder to reduce the crab angle but this technique is officially banned)