Defensive front question:

A Bear front, by definition, has a front eight not seven.

A double eagle look has a 3 tech. on either side and a head-up nose (0 tech.).

Some coaches use "bear" to describe any eight-in-the-box look. To me, a bear look is a 46:

--B---------B
E---3--0--3--7-9
--T-G-C-G-T-Y

The 7 tech. and 9 tech. are traditionally in a 2-point and the weak DE in a 3-point stance.
A traditional double-eagle is the almost the same, but without the 7 tech and with a cover two look behind it.