Maybe, but it's not like great trade-off on a global scale.
Extreme latitudes are colder because they receive their sunlight at an angle. The tilt of the Earth and the seasons make things more complicated, but conceptually, if you are at latitude 45, you are also at a 45 degree angle relative to the sun, so sunlight is only 70% as intense as it is at the equator.
With increased global temperatures, northern latitudes may have longer growing seasons, but they'll still have a different, probably inferior climate to what you're losing further south.
So while there may be winners and losers on a global scale, the winners will probably win less than the losers lose.
Extreme latitudes are colder because they receive their sunlight at an angle. The tilt of the Earth and the seasons make things more complicated, but conceptually, if you are at latitude 45, you are also at a 45 degree angle relative to the sun, so sunlight is only 70% as intense as it is at the equator.
With increased global temperatures, northern latitudes may have longer growing seasons, but they'll still have a different, probably inferior climate to what you're losing further south.
So while there may be winners and losers on a global scale, the winners will probably win less than the losers lose.