voxel size

Hello,

 

I'm trying to analyze two different sets of resting state data at the group level, one group collected at 3x3x3 voxel size and the other at 4x4x4 voxel size. Can I simply input into the SPM software that I collected the 3x3x3 data at 4x4x4? If I do this, does it damage the data collected at 3x3x3 in any way?

 

Thanks so much!