I'll tell you one thing you definitely can't use honey and syrup interchangeably for -- lemon honey tea.
There is really nothing more soothing than a lemon honey tea, and it actually has a lot of health benefits too.
Honey has been used for thousands of years as a natural remedy for everything from infections to arthritis, and now there is an increasing amount of research to back up the claims. For instance, honey has high antibacterial properties, and has also been shown to fight carcinogens in the body.
Likewise, lemon juice (not lemonade) has a lot of health benefits too. When mixed with hot water it is excellent for digestion, and also acts as a diuretic.
When you combine those into a honey lemon infusion, you get a ton of benefits from both the honey and the lemon that you definitely would not get if you switched it out with syrup!