In general reliability terms, one connector is better than two. But, if the
lack of connector allows for warpage and hence, reduced contact pressure at
certain locations, then it is a toss-up. Secondly, without the use of the
second connector, the pad contact material becomes significantly important as
gold over copper (with a flash of nickel) has less life expectancy than gold
(with a flash of nickel) over phosphor-bronze. I have assumed gold on gold on
the non-soldered connections. Do not use gold on solder as this will slowly
build an oxide barrier. Best to use gold on gold or tin on solder but not
solder on gold.
Best regards
Hans
