Neumann u87Ai vs. Gefell UMT 70
I’ve heard the multi-pattern Gefell UMT 70 (and cardioid only MT 71) called the “Poor Man’s 87.” But just how closely do they resemble one another other? These two actors were recorded on different days but in the same room with the same acquisition chain: u87Ai (cardioid, no pad, no rolloff), UMT 70 (cardioid, no pad, no rolloff) both to Focusrite Red 8 to Apogee PSX-100. In each case both mikes were recorded at the same time (same take). Recorded 24bit, 48k Hz and level matched in ProTools by ear. Each time we hear the u87Ai first.
The differences are subtle. You really should listen on a good repro system to compare/contrast. Download is enabled on both soundfiles.
Male voice- Dave Wittenberg.
Female voice- Anna Graves. This time we hear a standard announce, then with a softer voice, and finally a projected read.
For more comparisons, check out Dan Comerchero’s Big List of Microphone Shootouts.
Randy Coppinger 
I hear UMT70 is a bit brighter, but thinner, and it becomes more obvious with female voices. 87 is my choice.
It depends on the voice and how the recording works with everything else in the soundscape. Both mikes are great in their own way.