Bicycle Cassettes & Drivetrains - Google Sheets Check this chart. Main thing is to look for any derailleur with the correct "Pull Ratio" for Shimano 10 sp shifters which is 1.7 for any older external cable types such as yours. Also lists a few other details such as max/min cog, capacity, etc. but only the 1.7 ratio will work. Also lists some Microshift derailleurs that may work but not the XLE as you suspected.