Wells Fargo technically owns all of GoJets 900s and they are directly leased to GoJet. Delta does not own any of G7s 900s ( all have a "GJ" tail number), only under contract to fly for Delta. Delta does own all but a couple (maybe all of them?) of the Delta painted 700s, which have a "CA" tail number.

The last couple planes I flew;

Example 900s:

FAA Registry - Aircraft - N-Number Inquiry

GoJet Airlines N186GJ (Canadair Regional Jet - MSN 15165) (Ex CX-CRA ) | Airfleets aviation

Example 700s:

FAA Registry - Aircraft - N-Number Inquiry

FAA Registry - Aircraft - N-Number Inquiry