This may sound sacrilegious... I don't use a gun's safety, don't anticipate using one, and have no use for one. It's just one more thing to go wrong. When the bolt is is closed, I assume the gun is hot. Consequently, for my gun handling habits, the Mossberg's thumb safety is just something to get in the way. The only controls I want on a pump gun (beyond the cob) are the trigger and release. So, my choice would be between the Remington 870 Express and the Maverick 88. I voted for the R-870-Ex.
Okay, I do have some safeties that I use, but they're really hammer blocks. My S & W Model 52 Master, bullseye pistol is designed to allow dry firing practice when the "safety" is engaged.