putty and pssh both install /usr/bin/pscp, in both cases because they use a p prefix to differentiate from the openssh command.
pssh uses the p prefix for all of its commands.
putty uses p for four and putty for two.
Perhaps putty should use puttyscp, puttysftp, puttylink and puttyterm for consistency and to ensure no future collisions???
net-misc/pssh has RDEPEND=!net-misc/putty