Join Date: Aug 2011
Location: Barcelona, London, on a plane
Programs: IB+ Gold, TK E+, Hyatt Globalist, Marriott LTP, IHG Diamond
Posts: 14,182
If you have Elite status with TK, you earn a few more status miles on Business Class fares on TK metal... Otherwise no difference.
Codeshares are irrelevant. Operating carrier matters. But codeshares have a habit of booking into a different fare code, one that might not earn as many TK miles as you expected...