Not quite. In Europe, when a statement of trend is attached to a METAR, that trend forecast is valid for two hours, not the three of a TTF. The TREND is a forecast, and as such is valid for determining weather for the "one hour before and one hour after" requirement for the selection of alternates and the like.
Ah yes, by "equivalent" I didn't mean to imply
exact equality. But the idea of a TREND and a TTF (TREND TYPE FORECAST) is the same even if the validity periods differ.