timing differences is rather tough to control and i personally couldn't get the samples to sit right, just by nudging them.
I have a drum machine/sampler, that allows me to adjust the decay and attack of the samples. I also use layers to create one drum sound, as well as rendering out the layers into one take,and then slightly adjusting the attack and decay even more.
You can make a drum beat how ever you want it to sound like, but if we're talking technicality here, it'd be wise to mix your song with a 4x4 beat in mind. Then you have that option available to you. Unless you definitely know you won't be having kick and snare on top of each other. Use the reference point to mix with given the song's components.