At various times between 1978 and 1983, each of the major non-lead-singing G-men basically said, "Hey, I'm going to try singing lead on a whole album."
If you've heard all four of the resulting albums, how would you rank them? (Taking into account all factors, not just the singing.) Here is my ranking:
1. Tony - THE FUGITIVE
The first solo albums by Tony & Mike (A CURIOUS FEELING and SMALLCREEP'S DAY) seem like they would often be compared to each other; each was fairly lengthy, fairly progressive, and used a guest vocalist throughout. In the same way, comparisons between THE FUGITIVE and ACTING VERY STRANGE also seem inevitable. While I prefer SMALLCREEP'S over CURIOUS to a definite extent, FUGITIVE positively blows ACTING away in my opinion. Tony's singing is somewhat stronger than Mike's, but it's the quality of the actual songs that makes the difference for me. One of my favorite Genesis-related solo albums.
2. Ant - WISE AFTER THE EVENT
Ant's albums don't get much more ambitious or progressive-rock-oriented than this one. To me, though, the quality of both the songs and the singing is a little uneven. In particular, Ant's little "creaking" effect damages some of the best songs here. He would do much better singing later on, especially on INVISIBLE MEN.
3. Steve - CURED
Steve is, of course, the only one of the four who went on to sing multiple vocal albums. On CURED he was just getting started and didn't quite seem to know what he was doing yet; in particular, he focuses a bit too much on the upper part of his range. Even at this point, though, he was the most confident-sounding of the four. Unfortunately CURED is brought down by drum machines and rather weak pop songwriting.
4. Mike - ACTING VERY STRANGE
What can I say? Not only are the songs mostly nothing special to begin with, but poor Mike doesn't manage even one passable lead vocal here. (I'd say he comes closest on "A Day To Remember.") His album even used backing vocalists, unlike the other three. At least he eventually gave us a passable vocal on "Making A Big Mistake." Too bad he didn't sound more like that on ACTING.