Macro and close-up photography require having the correct lenses. Upgrading the body won't do much good. If you don't already have suitable lenses, the money would be better spent getting one.
Before upgrading the body, it would be helpful to first identify what is unsatisfactory about your current setup. Otherwise, you risk getting another camera with the same problems as your current one.
Personally, when I do closeup work, I prefer "Live View" with focus peaking. As far as I'm aware, Canon DSLRs do not have focus peaking without installing unsupported third-party firmware. So if I were in your situation, it would do no good to switch to another Canon DSLR. You can consider a mirrorless camera, where focus peaking is standard. However, because of the need for new lenses, it would likely be outside of your current budget.
If you are determined to get another Canon DSLR, you can decide by flipping a coin. As far as macro is concerned, you would be equally likely to be satisfied by either of the cameras you are currently considering.