Indoraptor wins. The Indoraptor has extremely thick and durable scutes on its back which could be used to counter the paralyzing and sickening quill venom. When the Scorpios Rex leaps into the air it spreads wide its limbs and leaves its underbelly and chest exposed, which could easily be taken advantage of by the more agile Indoraptor. The Indoraptor has a weaker bite however, as the Scorpios took down a Brachiosaurus in a few seconds, a creature many times heavier than the Scorpios Rex. The Indoraptor is definitely the fastest of the two, however, and could dodge many of teh heavy blows from the Scorpios and land some of its own as well. The Scorpios has been shown to have heat-seeking vision, it could easily be distracted by any other living, or even non-living, heat-generating things. In total, however, I believe the Indoraptor wins due to the Scorpios's tendencies to become distracted and how it exposes the weaker areas of its body when it leaps.
