Firstly I am biased to the extent that I have ridden EPs and not Bentchetlers (but I have ridden JJs which are similar and made in the same factory).
If you are doing the skiing you claim on these, not charging too hard and just playing around, drops to switch in pow, jumps, trees etc, then the EP is the best ski for you. What you described is exactly how I skied last season on my EPs and when I tried JJs they were simply not as good at this type of skiing, and I imagine the Bentchetler to be very similar. Don't get me wrong they still work great, but they are less 'surfy' and they float less well than the EP. I think this must be a product of camber under foot and less rocker. You can still do whatever you want on these and they still float great, but I genuinely think in the pow the EP is much more fun.
As for the EP itself, it is soft but I never noticed that to be a problem, they do pretty well on groomed (admittedly less well than JJ/Chetler) and you can charge harder than you would think. The one downside is they do get bounced around in choppy snow and don't break through sun/windpack as easily. I am the exact same size/weight as you and I loved this ski. Switch in pow with ease, butters all day, turns so quick in the trees, no chance of tip dive, its basically the most fun ski ever. The difference in size makes the EP float better due to wider tips/tails (definitely compared to JJs and this probably holds for Chetlers) but there is no difference in length or weight.
My EP pro review is in my profile, PM me with any questions you have. You will love EPs or look at the
Surface New Life (symmetrical, stiffer, long gradual rocker with high tips). Same surfy feel, centre mount, but less bounced in crud, and charges a bit better about same length and about equal to EP in weight.
This might help too:
Surface New Life (on the right, left is the narrower more rockered one life):