Horsepower is calculated from a measured torque reading...they are essentially the same. If you don't understand this relationship, do yourself a favor and read
I've read and agree and understand all that, but hp and torque aren't essentially the same thing just like mpg and gallons aren't essentially the same thing. Knowing car A has used 30 gallons vs car B's 15 gallons is meaningless without knowing how many miles. Just like torque without knowing time (rpm). The only reason we can kind of compare engines by torque is cause we generally are talking about gas engines in the 300-500 cid range and know torque peaks are in the 2000-5000 rpm range and almost every time the rpm is stated with the torque numbers basically giving us the idea of the hp.
Of course a 440 will make more hp at any given rpm, that's why we've stated 383 can make the same power but at a higher rpm, or think of it this way a 440 that makes peak hp at 5000 rpm (440×5000÷2=1.1 million cubic inches per minute) so (383×5744÷2=1.1 million cubic inches per minute) so a running 440 @ 5000 rpm is essentially the same size and potential as a 383 @ 5744 rpm.
