Both teams have had big problems in the secondary.
One big difference, obviously, is that the Lions had one of the best wide receivers in the league. Detroit wouldn't trade Calvin Johnson for every receiver on the Rams' roster.
The schedule was another difference.
The 2010 Lions went 0-4 with three of their first four games on the road. The Rams are 0-4 after playing three of their first four at home.
The Lions drew a home date against the Rams for their fifth game, whereas St. Louis visits 5-0 Green Bay to kick off a stretch featuring four of five games on the road, with the lone home game against New Orleans.
But the Lions of last season did stumble to a 2-10 start before winning their final four games, precipitating their 5-0 start to this season. And the current Rams do play their entire NFC West schedule in the second half of the season, offering relative relief.
We'll revisit this one late in the season. The Rams need to finish stronger for the comparison to hold up at all.