Comrade: There is no such thing as a Silly Newbie Question.
Your dyno charts should provide you with everything you need. They will have small summaries about Max HP, Torque Etc. Ultimately, what you be comparing are parts of the charts against that same part of the chart for the old one. What you will be looking at is related to what you are trying to achieve. So for example, if you were tuning to try to get more torque in the mid-range then that's what you'd be focused on. The only slight complication with dyno tuning is that results can be slightly different on different days due to factors such as air temperature Etc. Different dyno's can produce very different results so it is best to try to be consistent about which dyno you use.