Join Date: Aug 2011
Location: Barcelona, London, on a plane
Programs: IB+ Gold, TK E+, Hyatt Globalist, Marriott LTP, IHG Diamond
Posts: 14,182
Anywhere outside of the US that treats Diamonds well USUALLY treats Golds equally as well, unless the hotel is really full.
There aren't too many situations where you need to do a mattress run in order to be a Diamond for a specific stay.