Originally Posted by the suicidal eggroll
A 35F difference in two places is not a "70F difference". If you have $10 more in your wallet than your friend on Tuesday, and the same $10 more on Wednesday, you wouldn't say you have $20 more than your friend. Similarly, you wouldn't measure your heat shield in 10 different places, get the same 32F change in every spot, and call it a 320F change.
Total engine bay temperature difference is a 70f. Two different products, one temp measurement each.