I'm not making any promises about how well it will work, I just like it better than the other one for now.
The styrofoam incubator would occasionally shoot up to 103, 104, 105 sometimes for no reason. With no fiddling at all the aquarium will top out at 102 and settle around 98 at night. The top is just some fitted hardware cloth with a towel over it so, I solved that by adding a towel at night time to keep the temp from dropping and removing it at daytime to keep it from going up to 102. If it starts warming up, I just fold back a corner of the last towel for a half hour and it evens out just fine. I'm still having to baby it, but at least I know it won't shoot up to 105, the bulb just doesn't get that hot.
I believe that what killed my first set of eggs on day 19 was the temperature spiking over 104 while I was out for the day. At this point I'll take my chances with too low, as long as I don't have to worry about too hot.