The hulk that we have currently is massively powerful. He resisted the weight of a star, played tug of war with Exitar (a celestial), caused earthquakes around the world by fighting gamma powered boars and shattered a time barrier. All of this is without including WBH feats.
Now let's look at some of classic hulks feats. He Held apart two giant anti-matter spheres, held open a black hole like fissure that was seven feet in length (approximately it had the gravitational pull of 400+ earths), reflecting a universe/dimension busting attack with a thunder clap, destroyed a device that was made to fight against the celestials (considering a cosmic cube couldn't damage it, the device would have to be pretty powerful), literally tore apart nightmares dimension, punched a time storm (basically punched through reality), in incredible hulk #450 doctor strange stated hulks energy would destroy everything, went straight through vectors full power while he was repelling reality itself, and last but not least causing shockwaves through an infinite number of dimensions by clashing with iron clad.
Notice anything weird? I do. Classic hulks feats annihilate any feat current hulk has displayed! Now before anyone replies saying that it's not true, let me explain the difference between classic hulk and modern hulk.
Classic hulk was a ridiculous character in all aspects but despite that he has feats that surpass current hulk, he was defeated quite a bit of times from things that you would expect him to tank effortlessly. People were able to defeat him by draining his oxygen, gamma radiation overload, and knockout Gas under certain circumstances. See where I'm going with this? While being massively overpowered he was still capable of being defeated by characters way below his tier. The silver and bronze age were times were pretty much nothing made sense and most feats were incalculable, characters like superman, thor, and hulk were performing feats that couldn't even be quantified. They were essentially broken characters that were asking to be retconed.
The modern hulk doesn't have the same weaknesses that he had during the silver and bronze ages, has a more consistent win lose ratio, and has better quantifiable feats. What this means is...
Current hulk > Classic hulk
in terms of quantifiable feats.
Classic hulk > Current hulk
in terms of what was displayed for raw power output.