I haven't seen Sevens at my TJ for a couple years...still they were either cords/pants for $80 or jeans that were way too small for me. I was able to buy a pair of 23s on the clearance rack to resell though. I really want to get my bf a Ralph Lauren polo at TJ but the colors he would wear are all too small.
They are the same company, essentially (check out corporate info).
Where I live their selection is pretty much interchangeable and they sell the exact same brands for the same price. Giftcards for either store are acceptable in both.