Me and my friend were comparing some Monsterverse noises when we (somehow lol) started looking up Cloverfield stuff. During this we noticed that one of Clover's roars were pretty similar to JP Rex, upon closer examination it looked pretty likely to us that the clover roar is built on the Rex audio source Here is the Clover roar in question as well as the original untouched Rex roar https://cdn.discordapp.com/attachments/787117797046091808/864276770110832690/Clover_roar1.ogg https://cdn.discordapp.com/attachments/787117797046091808/864277087183175691/JPREX.ogg
My friend also made a slowed version of the Rex roar as well as a sped up version of the clover roar to compare them https://cdn.discordapp.com/attachments/787117797046091808/864277513018933279/JPrex_slowed.ogg https://cdn.discordapp.com/attachments/787117797046091808/864277832380973056/Clover_roar_sped_up.ogg