You can mark the check boxes on the page to compare the games fast. Take the BBGsite Rank homepage (http://rank.bbgsite.com) as an example!
As shown above, after marking the check box before Evony (Civony) (shown in the first red frame), you’ll see “Evony (Civony)” displayed in the comparison column (shown in the second red frame) on the left side. Then, you can select the other games you want to compare in the same way, e.g. zOMG! and Lord of Ultima as shown below:
After that, click in the comparison column on the left side to start the comparison among the 3 games, and you’ll see the contrast results similar to those in the 4th question ( How to compare the games?).