the maduro in the diploma is very different. it has a lot less kick and body. If you like the rough aroma aspects of the natural you will dislike the maduro but if the natural was a little to much for you then the maduro might be your cup of tea.
If you want to try a great cigar as a lesser cost alternative. Try the camacho corojo monarca. Same size and same tobacco just not aged and the wrapper is a shade grown rather than a sungrown so the flavor is not quite as rich but it comes close.