I peronally prefer the Encore platform simply because it will handle higher pressure rounds. If I could only have one, it would be the Encore.
However, I own both and am glad I have both.
The Encore can extend the range compared to the Contender when looking at standard factory chamberings. Wildcat rounds in the Contender will extend the range compared to std. factory rounds in the Contender. Wildcat Encore chamberings are even more powerful yet.
The Encore as mentioned is a bit heavier, and the reach to the trigger is a little more (important if you have small hands), but can be helped a lot with custom grips or aftermarket grips like Pachmayr.
While the Contender can be chambered in such rounds as 375 JDJ (available from SSK as well as T/C's Custom Shop), and capable of taking the largest game in the world, these rounds aren't really "long range" rounds like some would consider "long range".
The truth of the matter is that for most folks, the Contender will handle 90+% of all hunting (deer, etc), and the Encore just simply adds a twist that allows some of us who seem to thrive on BIG guns have something to whet our appetites with also.
I've owned more Encore bbls than Contender bbl's simply because the Encore could handle the pressure, while the Contender couldn't.
I must say, however, that the Contender fits my hand better than the Encore, but not by much.
Regards,
Rog