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All FRS radios have the same channels (except maybe the ones with Hello Kitty or Spongebob.) They are low power and don't require a license.

There are also GMRS radios. Those require a license. The GMRS radios are sometimes higher power, but not always. They also have their own GMRS channels. The confusion comes from several channels are shared by FRS and GMRS, and many companies make dual band FRS/GRMS that can use all channels. (FRS-only, GRMS-only, and shared.) Transmitting on GRMS-only channels without a license (or on shared channels at high power without a license) is a Federal crime. Like carrying on COE lakes.

If you plan to use privacy tones, make sure they're compatible with the different radios. We had that problem at an event I volunteered.