I own a 336 CS in 35 remington and I own a 30/06 in a 7600 carbine pump. Both guns are awesome in the woods and I alternate between them..(I have been favoring the '06 as of late) Anyways, I can give you the pro's and cons of each through my eyes. As a background, I shoot 200 grain remington core lokts in the 35 and 150 grain hornady interbonds in the '06.
The marlin is a more accurate weapon (albeit not by much and using 100 yds as a measure)..At 50 yds , I am breaking the same hole..The '06 is good but not quite as tight. The '06 is about a quarter pound lighter and you can tell when you touch off the trigger
The marlin fits better when I pull it up but the 7600 carries better still hunting in brush country..
you should really stop by a gun shop and pick both weapons up and shoulder them as if in hunting situations..This should determine your purchase. The only thing that would sway me, if I were you, would be if you handload..Handloading, you could get more out of the pump. What you get is negligible if you plan to hunt at 140 yds and under..Either way, you will not be disappointed .
Enjoy