I have been building credit with a card for about 6 years while I went through school. My credit score is decent so I'm looking into opening another card to take advantage of cash back deals and increase my max credit. My current bank has a tempting offer for a cash back card, but there are other options out there. All other things being equal I'd prefer to go with the same institution for the sake of convenience.
Is there any difference in building credit score between 2 cards at one bank and 2 cards at 2 banks?