Apples vs. Oranges...
The .30/06 in your average Sporter rifle (long-action, ~9.0lbs with scope), the .30/06 is all the way around more superior to the excellent but hamstung .358wcf.
The .358 is superior to the .30/06 when it come to putting it in a compact rifle, and when fed with a premium bullet such as a Nosler .358" 250gr Partition, for SHORT RANGE use on LARGE game such as moose and great bears (brown, grizzley). But then,only when fed handloaded ammo....
The .30/06 is a PROVEN cartridge when fed a 200gr or heavier bullet, but guides prefer a larger gun for "STOPPING" a wounded and/or enraged bear, such as a cornered sow with cubs or a wounded animal, or one defending a carcass. There is a difference between the .30/06 and the offspring .338/06 and .35Whelen. But, it's not THAT MUCH difference. I went with the .338/06 rather than the Whelen I'd long planned on building as the .338 has superior downrange ballistics to either the .30 or .35. At ranges beyond 200yds the .30/06 IS superior to the .35Whelen. No doubt about it.
The advantage of the .30/06 is not with the nebulous "foot/lbs" of energy. It's in the construction, ballistic coefficient, and sectional density of the premium bullets that are common and easily available in factory loaded ammo, as well as handloading componenets. Both Barnes and Federal offer the Triple Shock and X-Bullets, as well as Federal, Remington, and others offering the premium bullets such as the Nosler Partitons, Swift A-frames, and Woodleigh Weldcore, not to mention the monolithic and bonded bullets by Hornady. There is/are only one factory load available for both the .35Whelen, and .358wcf as far as I know, and are only in standard line ammo. However, the 250gr Corlokt is excellent in the .35Whelen, but is loaded quite lightly, like 2,300fps at the muzzle. Less from a 22" sporter. I know, as I chrono'd some ammo for a fellow at the range one day. It was a Remington M700 "Classic". The 200gr ammo went 2,600fps and the 250 ran 2,290fps. I convinced him he needed to start reloading by showing him my .338/06 and ammo loaded in .30/06 once fired range pick-up brass...... Since that time, the 250gr load has been dropped and only the 200gr loading is available. The .358wcf is the 250gr Winchester SilverTip, which is excellent on deer, perhaps elk, but it too lightly constucted for large game. They only chrono'd ~2,160fps from a friends BLR in .358, but killed deer very reliably. But, we recovered too many of them expanded to about 0.80" to be comfortable using them on anything more than hogs or black bears.
I've been drawn for an Elk tag in Wyoming this fall. Where I will be hunting also has grizzlies, as well as black bears. I'll be taking the light-weight .30/06 and my .338/06 (heavy at 10lbs, not something I carry very far). I, however don't particularily worry about the bears except on abandonded carcasses........ Then, I tred lightly and carry another friend as backup, and help for packing out the remains.... I'll likely feed the .30 with 180gr Nosler Part's, and the .338 is loaded with 210gr Partitions @2,800fps, and 250gr Hornady PtSpt "Interloks" @ 2,600fps.
