There have been constant complaints about CSI: Miami because it is too similar to CSI. People have to realize that this show is not totally disconnected from CSI, but rather it is a spin-off by the same producer, writers, etc... The jobs are similar in crime scene investigations. The characters seem similar at first, but they are worlds apart.
Gil Grissom dislikes getting attached to cases in any way, but Horatio Caine is either your best friend (to the victims) or your worst enemy (to the suspects and the criminals).
Calleigh Duquesne is comparable to Catherine Willows. Both have family problems, both are often having trouble with men. (Calliegh- they are all over her, Catherine- just can't find a good one)
Eric and Nick are both the "ladies man" of their groups. They also have problems with evidence, Eric sneezes on it once, and Nick pulls the coating off an "ancient" sword once when he is finger printing it. Yet, we still see differences. Eric's family is very important to him, while we never hear things about Nick's family.
Kim Delaney's character, Meghan, and Sara Sidle can be deemed similar in only one aspect- they both have problems. Sara was abused and abused alcohol. Meghan's husband died and she cannot get over it.
The coroners are different as well. Doc Robbins is nonchalant and even drinks coffee when he is telling Grissom about the victim. Alexx Woods feels pain for the victims and talks to them as if they were talking back.
The characters are a little more dramatic on a regular basis, but less dramatic at big crime scenes. Eric becomes angry when the police do more for a missing blue-eyed, blonde-haired girl than they do for a missing Cuban girl, yet he doesn't reach the extremes and start shouting at the suspect as Sara did once. When the four murders occurred in CSI, everyone worked almost non-stop, some went without sleep. In the multiple on CSI: Miami, everyone stays pretty calm and collected on the outside, even when it came to the baby.
This show was made to hold up CSI. They did not want it to overcome CSI, but rather have it support viewers, giving them more options and enticing them to buy more products. The investigators are cops as well, making the show similar to a cop show, yet, CSI: Miami maintains the air of CSI.