Hulk loses. If (And I stress the word if) he ever gets p!ssed enough to overcome their combined strength, he'll be too far away to make up the ground that he lost.
The Juggernaut possesses Class 100 strength, enabling him to lift (press) over 100 tons. The Juggernaut is said to be unstoppable, and the upper limit to his strength is not known
In his battles, Thanos has displayed not only his awesome durability, but also staggering physical strength. Impressive degrees of physical strength are the norm with Cosmic Eternals. The former leader of Earth's Eternals, Zuras, possessed physical strength at the level of superhuman class 50, as does the current leader, Ikaris. The most physically powerful of the Earth Eternals was a being that went by many names over the course of his long life, including Samson, and Gilgamesh. He was commonly referred to as the Forgotten One due to his former status as an outcast. The Forgotten One posessed superhuman strength in the class 100 range.
The aforementioned HBOTMU Book of the Dead openly states that before his death, Thanos presumably "possessed at least Class 100 strength, enabling him to lift (press) over 100 tons". This clearly places him in a class alongside such beings as Thor and the Hulk in the strength department.
While it is not proven that Death increased his strength along with his resilience and other abilities, it is assumed that she did so. However, the level to which it was increased is unknown.
One topic of frequent debate revolves around whether or not Thanos' base strength is greater than the base level of strength for the Hulk. An incident during the Infinity War leans towards the theory that under normal circumstances, Thanos is stronger than the Hulk. Fans of the jade giant, naturally, refute this...ignoring the ability of one of the two key forces of this universe ( Namely Death ) to augment anyone to nearly any level she so chooses.
Ramus, A frequent poster to the Marvel boards, had the opportunity to ask a true authority about the matter. Writer Peter David, who wrote the Hulk comic for about 12 years, is a subscriber on AOL. Ramus decided to e-mail David about the matter. He was very detailed in his questioning, desiring to avoid any confusion.
To quote Ramus, he asked "if he ( Peter David ) thought Thanos was on a physical strength level higher than Hulk at any time he was writing (meaning various incarnations)."
David's reply was simple, answering: "Yeah, probably. Thanos is kind of in his own weight class