[aj48198]

There are plenty of differences with one of the main differences being cost: Free vs $30. But why not have both? Install the MR and use SPB on top of it? SPB Mobile Shell is just that, a shell. It works no matter what rom is on the device. Granted it takes some getting use to, but if you don't like it you could always remove it. Plus there is a trial period for it too, so there is no cost in the beginning. There are some roms here that have SPB cooked into the rom, and they too have the trial period and I think they use Titanium as the base. MM's roms are solid, and are great to use as a base for SPB. SPB has more customizing widgets and things you can use to make it your own. It all boils down to what you prefer. Again, you can always remove SPB and just use MM if its not your thing. I just had both of them running together and I liked it but I found myself using Sense more because I didn't want to spend the time customizing like I have in the past. Cant go wrong with either one tho.