another inane question

In my search for the perfect economy seat I was wondering if any of the "extra legroom seats" (not exit) on the 340-300 and 340-600 are better than others?

Thanks!

On the 343 they're all identical I think.

On the 346 most are in the 30s which are obviously further forward (so nearer the exit and the immigration hall) than those in the 50s. But other than that, they're all the same.

Thank you gumshoe!
Teresa