I chose a DualPro XL charger for my boat because it actually shuts off when the batteries are charged. It doesn't turn back on unless the voltage drops below a certain level. It's safe for my agm batteries, too. I don't know anything about the features of the two chargers/maintainers you're looking at, but a full and real automatic shutoff and monitor feature is a real plus. Here are the specs on my charger (2 bank):
# Fully Waterproof
# Independent Outputs
# Fully Automatic / Complete Shut-Off
# Overcharge Protection
# True Reverse Polarity Protection
# Return to Charge Maintenance Mode
# No Installation Restrictions
# Over Current Protection
# Temperature Compensated Charging Technique
# Short Circuit Protection
# LED Readouts
# Meets FCC 15 Parts A & B
# Identified Charge Cables
# Advanced Microprocessors
# CE Approved "ISO 8846-Marine"
# Ignition Protected (US Coast Guard 33 CFR183-410
# AGC 30 amp fuse
# 3 year manufacturers warranty
# Made in the USA
