I don't care how you load it, the 35 Whelen is about a 250 yard cartridge. Out to that distance, it definitely has a decisive edge in terminal performance over the 33's. But, the fat, stubby 35 caliber bullets start to fall out of the air past 250 yards. From there, even the modest 338-06 will walk all over any 35 caliber in existence. The various 33 caliber bullets simply fly better than their 35 caliber counterparts, making precise payload delivery much easier. That is a factor that matters very much. The 185 and 200 class .338 bullets can be driven well north of 3100 fps from a Win Mag case and a 24" barrel by any competent handloader. Even driven at the same velocity, no similar 35 caliber bullet can compete. The margin grows wider as the bullets get heavier.
Inside 250 yards, though, the 35 is the clear winner. Which one is better depends greatly on one's hunting style, shooting skill level, and logistical factors surrounding the chosen cartridge.
Truthfully, though, a properly loaded 30-06 or 300 Win Mag is more versatile and less fuss than any 33 or 35 caliber. That's if we are taking a practical approach to ANY of the problems being considered. OTOH, what fun is that?!?